Class 9th Mathematics Part I MHB Solution
- Alka spends 90% of the money that she receives every month and saves Rs. 120. How much…
- Sumit borrowed a capital of Rs. 50,000 to start his food products business. In the…
- Nikhil spent 5% of his monthly income on his children's education, invested 14% in…
- Mr. Sayyad kept Rs. 40,000 in a bank at 8% compound interest for 2 years. Mr. Fernandes…
- Sameera spent 90% of her income and donated 3% for socially useful causes. If she left…
- Observe the table given below. Check and decide, whether the individuals have to pay…
- Mr. Kartarsingh (age 48 years) works in a private company. His monthly income after…
- For different types of investments what is the maximum permissible amount under…
- A person has earned his income during the financial year 2017-18. Then his assessment…
- Mr. Shekhar spends 60% of his income. From the balance he donates Rs. 300 to an…
- Mr. Hiralal invested Rs. 2,15,000 in a Mutual Fund. He got Rs. 3,05,000 after 2 years.…
- At the start of a year there were Rs. 24,000 in a savings account. After adding Rs.…
- Mr. Manohar gave 20% part of his income to his elder son and 30% part to his younger…
- Kailash used to spend 85% of his income. When his income increased by 36% his expenses…
- Total income of Ramesh, Suresh and Preeti is 8,07,000 rupees. The percentages of their…
- Compute the income tax payable by following individuals. i. Mr. Kadam who is 35 years…
Practice Set 6.1
Question 1.Alka spends 90% of the money that she receives every month and saves Rs. 120. How much money does she get monthly?
Answer:
Method 1: Let the total money be = Rs. x
Now money she spends = 90% of x = 
The money she saves = 120
Now
Money spent + Money saved = Total Money
90x + 12000 = 100x
100x – 90x = 12000
10x = 12000
x = 1200
She earns Rs 1200 .
Method 2:
percentage of spending = 90%
= 10%
Total money received =
= Rs.1200
Question 2.
Sumit borrowed a capital of Rs. 50,000 to start his food products business. In the first year he suffered a loss of 20%. He invested the remaining capital in a new sweets business and made a profit of 5%. How much was his profit or loss computed on his original capital?
Answer:
Capital borrowed by Sumit = Rs 50,000
Now, Loss in first year = 20% of Rs 50,000
= 
= Rs 10,000
∴ Remaining capital = Rs 50,000 – Rs 10,000
= Rs 40,000
Then,
He invested remaining capital in sweet business and had a profit of 5%.
∴ Profit amount = 5% of 40000
= 
= Rs 2000
He occurred a profit of Rs 2000.
∴ The capital will be Rs 40000 + Rs 2000
= Rs 42,000.
Now,
Original capital = Rs 50,000
New capital after 2 years = Rs 42,000
∴ Loss% = 
= 
= 16%
Hence, his capital after 2 years = Rs 42,000 & he suffered a loss of 16% on the initial capital.
Question 3.
Nikhil spent 5% of his monthly income on his children's education, invested 14% in shares, deposited 3% in a bank and used 40% for his daily expenses. He was left with a balance of Rs. 19,000. What was his income that month?
Answer:
Let the monthly salary of Nikhil = Rs x
The following table gives the expenditure of Nikhil:
∴ Total expenditure = 5% + 14% + 3% + 40%
= 62%
Now, remaining salary = 100% - 62% of total salary
= 38% of total salary
= Rs 19,000 ( given)
∴ 38% of x = Rs 19,000
⇒ 
⇒ 
⇒ x = Rs 50,000
Hence, the monthly income of Nikhil = Rs 50,000.
Question 4.
Mr. Sayyad kept Rs. 40,000 in a bank at 8% compound interest for 2 years. Mr. Fernandes invested Rs. 1,20,000 in a mutual fund for 2 years. After 2 years, Mr. Fernandes got Rs. 1,92,000. Whose investment turned out to be more profitable?
Answer:
For Mr. Sayyad,
Principal amount, P = 40,000
Rate, r = 8%
Time period = n = 2year
Compound Interest (C.I) = 
C.I = 
= 40,000(1.664-1)
= 40,000(0.664)
= Rs. 6656
% profit(p) = 
= 16.64%
For Fernandes,
Principal rate, P = Rs. 1,20,000
Time period, n = 2yr
Principal amount, A = Rs. 1,92,000
Profit = 1,92,000 – 1,20,000 = Rs. 72,000.
%Profit (p) = 
= 60%.
Hence, Frenandes mutual fund is found to be profitable.
Question 5.
Sameera spent 90% of her income and donated 3% for socially useful causes. If she left with Rs. 1750 at the end of the month, what was her actual income?
Answer:
Given,
Let Sameera’s income be Rs x.
Then, amount she spends = 90% of x
Donations by Sameera = 3% of x
Remaining amount = 100 – (90 + 3)% of x
And, the remaining amount = Rs. 1750
Here, 7% of x = Rs 1750
⇒ 
⇒ 
⇒ x = Rs 25,000
∴ her monthly income is Rs. 25,000.
Practice Set 6.2
Question 1.Observe the table given below. Check and decide, whether the individuals have to pay income tax.
Answer:
The tax rates for a year budget are shown below are given in the three tables:
Table I
Table II
Table III
i) No,
According to 1st table because Annual Income is less than 2.5lacs.
Hence, she is not eligible for paying the income tax.
ii) Yes, because Mr. Kulkarni’s salary lies between 2.5 l to 5 l. Hence, he is eligible for paying tax.
iii)Yes, because the income is greater than 2.5 l (from table I)
iv)Yes, because the income is greater than 2.5 l.
v)No, because (table 3)
Question 2.
Mr. Kartarsingh (age 48 years) works in a private company. His monthly income after deduction of allowances is Rs. 42,000 and every month he contributes Rs. 3000 to GPF. He has also bought Rs. 15,000 worth of NSC (National Savings Certificate) and donated Rs. 12,000 to the PM's Relief Fund. Compute his income tax.
Answer:
According to 1st table,
His monthly income = Rs 42,000
⇒ Annual Salary = 12 × Rs 42,000
= Rs. 5,04,000
Now, following table shows his investments:
Taxable salary = Rs. 5,04,000 – (Rs. 63,000)
= Rs. 4,41,000
It comes into table 1 and income tax slab 2.
5%(taxable minus 2.5lacs) = 
= Rs.9550
∴ Income tax = Rs.9550
Primary cess = 2% of I.T.
= 
= Rs.191
Secondary cess = 1% of I.T.
= Rs.95.5
Total income tax = Rs.9550 + Rs.191 + Rs.95.5
= Rs.9836.5
Problem Set 6
Question 1.Write the correct alternative answer for each of the following questions.
For different types of investments what is the maximum permissible amount under section 80C of income tax?
A. 1,50,000 rupees
B. 2,50,000 rupees
C. 1,00,000 rupees
D. 2,00,000 rupees
Answer:
The maximum amount of deduction that can be claimed under Section 80C of the Income Tax Act is Rs.1.5 lakh.
Question 2.
Write the correct alternative answer for each of the following questions.
A person has earned his income during the financial year 2017-18. Then his assessment year is ....
A. 2016-17
B. 2018-19
C. 2017-18
D. 2015-16
Answer:
The period in which the income is earned is called the financial year. And, the income tax are filed in the next year of the financial year. It is called the assessment year.
∴ if he earned his income in 2017-18, his assessment year will be 2018-19.
Question 3.
Mr. Shekhar spends 60% of his income. From the balance he donates Rs. 300 to an orphanage. He is then left with Rs. 3,200. What is his income?
Answer:
Mr. Shekar’s income = Rs x
Amount spent = 60% of x = 
Remaining balance = 
Donation to an orphanage = Rs.300
Remaining balance = 
= Rs.3200
⇒ 2x = 
x = Rs.8750
Income is Rs. 8750.
Question 4.
Mr. Hiralal invested Rs. 2,15,000 in a Mutual Fund. He got Rs. 3,05,000 after 2 years. Mr. Ramniklal invested Rs. 1,40,000 at 8% compound interest for 2 years in a bank. Find out the percent gain of each of them. Whose investment was more profitable?
Answer:
According to question,
For Ramnikal,
Principal amount = Rs. 1,40,000
Rate, r = 8%
Time period, n = 2years
Compound interest (CI) =
= 
= 
= Rs.23296
% gain = 
= 
= 16.64%
For Hiralal,
Principal amount = Rs. 2,15,000
Amount gained = Rs. 3,05,000
Time period, n = 2year
Profit/gain = A - P
= 3,05,000 – 2,15,000
= Rs. 90,000
% gain = 
= 
= 41.86%
Mr. Hiralal investment is more profitable.
Question 5.
At the start of a year there were Rs. 24,000 in a savings account. After adding Rs. 56,000 to this the entire amount was invested in the bank at 7.5% compound interest. What will be the total amount after 3 years?
Answer:
Balance at the start of the year = Rs. 24000
Amount added = Rs. 56,000
Total = Rs. 80,000
Interest rate = 7.5% per annum
Period of accumulation = 3yr
Formula,
A = 
Amount of maturity after 3 year,
= Rs. 
= Rs. 80,000×1.075×1.075×1.075
= Rs. 99,383.75
Question 6.
Mr. Manohar gave 20% part of his income to his elder son and 30% part to his younger son. He gave 10% of the balance as donation to a school. He still had Rs. 1,80,000 for himself. What was Mr. Manohar's income?
Answer:
Mr. Manohar’s income = A
Amount given to elder son = 20% of A = 
= 
Amount given to younger son = 30% of A = 
Balance = 100% - 30% -20%
= 50%of A
= 
Donation given to school = 
= 
Balance = 
= 
⇒ 
= Rs.180000
A = Rs. 
= Rs. 400,000
⇒ Income is Rs 4,00,000.
Question 7.
Kailash used to spend 85% of his income. When his income increased by 36% his expenses also increased by 40% of his earlier expenses. How much percentage of his earning he saves now?
Answer:
Let Kailash’s salary = Rs. 100
Old spend = 100×85% = 85
New salary = 136%of 100 = Rs.136
New expenditure = 
= Rs.116
Save = Rs. 136 – Rs. 119
= Rs.17
%S = 
= 12.5%
Question 8.
Total income of Ramesh, Suresh and Preeti is 8,07,000 rupees. The percentages of their expenses are 75%, 80% and 90% respectively. If the ratio of their savings is 16 : 17 : 12, then find the annual saving of each of them.
Answer:
Let their savings be 16x,17x,12x
Saving = income – expenditures
Saving% = 100 – expenditure%
Hence saving are 25% ,20% , 10% respectively,
Saving % = 
Their incomes are,
= Rs.807000
Then x = Rs. 3000
Hence saving are Rs. 48,000 , Rs. 51,000 , Rs. 36,000
Question 9.
Compute the income tax payable by following individuals.
i. Mr. Kadam who is 35 years old and has a taxable income of Rs. 13,35,000.
ii. Mr. Khan is 65 years of age and his taxable income is Rs. 4,50,000.
iii. Miss Varsha (Age 26 years) has a taxable income of Rs. 2,30,000.
Answer:
i) In case of Mr.kadam who is 35 years and taxable income is 13,35,000
•up to 250000 - No tax (0 %)
•2,50,000 to 5,00,000 - 12,500 (2,50,000 x 5%)
•5,00,000 to 10,00,000 - 1,00,000 (5,00,000 x 20%)
•remaining 3,35,000 - 1,00,500 (3,35,000 x 30%)
Income Tax is 2,13,000 + Education cess 3% on 2,13,000
Total tax is 2,19,390
(ii) in the case of Mr. Khan who is 65 yrs and 4,50,000 income taxable
upto 300000 - No tax ( 0 % )
remaining 150000 - 7500 ( 150000 x 5%)
Income Tax is 7500 + Education Cess 3% of 7500
Total Tax is 7725
(iii) In the case of Miss Varsha who is 26 yrs and 2,30,000 taxable income.
upto 2,50,000 income - no tax
Total tax - NIL
