A person spends 25% of his income on food, 20% on rent, 15% on education and saves the rest. If his savings are Rs. 7200, his income is: MCQ with Answer and Explanation

Question

A person spends 25% of his income on food, 20% on rent, 15% on education and saves the rest. If his savings are Rs. 7200, his income is:

A. Rs. 16000

B. Rs. 20000

C. Rs. 18000

D. Rs. 15000

Answer: Option C

Solution (By JKSSB Mock Tests)

Spend % = 25+20+15=60%, save 40% = 7200, income = 7200/0.4 = 18000.

This question belongs to: Maths Percentage

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The price of petrol increases by 30%. By what percent should a person reduce consumption so that expenditure increases only by 10%?

A. 14.5%

B. 18%

C. 16.67%

D. 15.38%

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Correct Answer: Option D

Explanation:
1.3 × x = 1.1 → x = 1.1/1.3 ≈ 0.84615, reduction 15.38%.

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Question #2

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A man sells an article at 10% profit. Had he bought it at 20% less and sold it for Rs. 10 less, he would have gained 25%. Find the cost price.

A. Rs. 100

B. Rs. 80

C. Rs. 110

D. Rs. 90

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Correct Answer: Option A

Explanation:
CP=x, SP=1.1x. New CP=0.8x, new SP=1.1x-10. 1.1x-10 = 1.25×0.8x = x → 0.1x=10 → x=100.

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Radius of circle decreased 20%. Area decreases by:

A. 34%

B. 32%

C. 36%

D. 38%

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Correct Answer: Option C

Explanation:
Area multiplier = 0.8² = 0.64, decrease 36%.

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