Kerosene price up 20%. To keep expenditure same, reduce consumption by: MCQ with Answer and Explanation

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Kerosene price up 20%. To keep expenditure same, reduce consumption by:

A. 16.67%

B. 20%

C. 15%

D. 18%

Answer: Option A

Solution (By JKExamLibrary)

Reduction = (20/120)×100 = 16.67%.

This question belongs to: Maths Percentage

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Question #1

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A number is increased by 20% and then decreased by 20%. What is the net change?

A. 2% decrease

B. 4% increase

C. 4% decrease

D. No change

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Correct Answer: Option C

Explanation:
Net change = x^2 / 100 % decrease. 20^2 / 100 = 400 / 100 = 4% decrease.

This question belongs to: Maths Percentage

Question #2

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Length of rectangle increased by 10%, breadth decreased by 10%. Percentage change in area:

A. 2% decrease

B. 1% increase

C. No change

D. 1% decrease

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Correct Answer: Option D

Explanation:
1.1 × 0.9 = 0.99, 1% decrease.

This question belongs to: Maths Percentage

Question #3

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What percent of 200 is 40?

A. 10%

B. 25%

C. 15%

D. 20%

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Correct Answer: Option D

Explanation:
(40/200)×100 = 20%.

This question belongs to: Maths Percentage

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