What is 30% of 30% of 200? MCQ with Answer and Explanation

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What is 30% of 30% of 200?

A. 24

B. 20

C. 18

D. 30

Answer: Option C

Solution (By JKSSB Mock Tests)

0.3 × 0.3 × 200 = 18.

This question belongs to: Maths Percentage

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Question #1

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The price of a commodity is increased by x% then decreased by x%. Net decrease is 9%. Find x.

A. 30

B. 20

C. 35

D. 25

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Correct Answer: Option A

Explanation:
1 - x²/10000 = 0.91 → x² = 900 → x = 30.

This question belongs to: Maths Percentage

Question #2

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If the length of a rectangle is increased by 20%, by what percentage must the width be decreased to maintain the same area?

A. 25%

B. 20%

C. 16.67%

D. 30%

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Correct Answer: Option C

Explanation:
Required decrease = (20 / 120) * 100 = 16.67%.

This question belongs to: Maths Percentage

Question #3

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Kerosene price up 25%. To keep expenditure same, reduce consumption by:

A. 15%

B. 25%

C. 20%

D. 18%

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Correct Answer: Option C

Explanation:
Reduction = (25/125)×100 = 20%.

This question belongs to: Maths Percentage

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