Suman saves 10% of her monthly salary. Now her expenditure increases by 30% and savings increases by 50%. The present increase in her salary is

- a)25%
- b)30%
- c)32%
- d)40%

Correct answer is option 'C'. Can you explain this answer?

7 Answers

Vyom Dadhich
answered
Mar 01, 2019

Let 100Rs=income

then expenditure is 90Rs and saving is 10Rs

now saving is increased by 50%=5Rs

and expenditure by 30%=27Rs

27+5=32.

then expenditure is 90Rs and saving is 10Rs

now saving is increased by 50%=5Rs

and expenditure by 30%=27Rs

27+5=32.

Prakhya Shrivastava
answered
Jul 18, 2019

Let's Suman's monthly salary is 100

She saves 10% of her salary

i.e.10% of 100 = 10

Also her expenditure = 100-90 = 90 or 90%

According to the question

When expenditure is increased by 30%

such that, 90+(30% of 90) = 90+[(30/100)×90] = 117

and savings increased by 50%

such that, 10+(50% of 10) = 10+[(50/100)×10) = 15

New salary = expenditure + savings

= 117+15 = 132

Increase in salary = old salary - new salary = 132-100=32

In %age, (32/100)×100 = 32%

Hence option (c) I is correct

She saves 10% of her salary

i.e.10% of 100 = 10

Also her expenditure = 100-90 = 90 or 90%

According to the question

When expenditure is increased by 30%

such that, 90+(30% of 90) = 90+[(30/100)×90] = 117

and savings increased by 50%

such that, 10+(50% of 10) = 10+[(50/100)×10) = 15

New salary = expenditure + savings

= 117+15 = 132

Increase in salary = old salary - new salary = 132-100=32

In %age, (32/100)×100 = 32%

Hence option (c) I is correct

Shanul Haque
answered
Oct 24, 2019

She saves 10% of her salary

i.e.10% of 100 = 10

Also her expenditure = 100-90 = 90 or 90%

According to the question

When expenditure is increased by 30%

such that, 90+(30% of 90) = 90+[(30/100)×90] = 117

and savings increased by 50%

such that, 10+(50% of 10) = 10+[(50/100)×10) = 15

New salary = expenditure + savings

= 117+15 = 132

Increase in salary = old salary - new salary = 132-100=32

In %age, (32/100)×100 = 32%

Hence option (c) I is correct

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