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. 15%

B. 16.67%

C. 18%

D. 20%

Answer: Option B

Solution (By JKSSB Mock Tests)

Reduction = (20/120)×100 = 16.67%.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

Number increased 40% then decreased 30%. Net change:

A. No change

B. 2% increase

C. 2% decrease

D. 10% decrease

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Correct Answer: Option C

Explanation:
1.4 × 0.7 = 0.98, 2% decrease.

This question belongs to: Maths Percentage

Question #2

If the length of a rectangle is increased by 25%, by what percentage must the width be decreased to keep the area unchanged?

A. 20%

B. 15%

C. 25%

D. 33.33%

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Correct Answer: Option A

Explanation:
Required decrease = (25 / 125) * 100 = 20%.

This question belongs to: Maths Percentage

Question #3

A number is erroneously multiplied by 4/3 instead of 3/4. Percentage error in calculation:

A. 77.78%

B. 75%

C. 66.67%

D. 80%

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Correct Answer: Option A

Explanation:
Correct = (3/4)x, wrong = (4/3)x. % error = [(4/3 - 3/4)/(3/4)]×100 = (7/9)×100 ≈ 77.78%.

This question belongs to: Maths Percentage

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