A weight is measured as 9.8 kg instead of 10 kg. What is the percentage error? MCQ with Answer and Explanation

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A weight is measured as 9.8 kg instead of 10 kg. What is the percentage error?

A. 2%

B. 3%

C. 1%

D. 4%

Answer: Option A

Solution (By JKSSB Mock Tests)

Error = 10 - 9.8 = 0.2. % Error = (0.2 / 10) * 100 = 2%.

This question belongs to: Maths Percentage

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Practice More Percentage Questions

Question #1

If 20% of (A+B) = 50% of (A-B), then A:B is:

A. 3:5

B. 3:7

C. 7:3

D. 5:3

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Correct Answer: Option C

Explanation:
0.2(A+B)=0.5(A-B) → 2(A+B)=5(A-B) → 2A+2B=5A-5B → 7B=3A → A/B=7/3.

This question belongs to: Maths Percentage

Question #2

5/8 expressed as percent is:

A. 65%

B. 62.5%

C. 67.5%

D. 60%

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Correct Answer: Option B

Explanation:
(5/8)×100 = 62.5%.

This question belongs to: Maths Percentage

Question #3

The ratio of the ages of A and B is 5:7. After 10 years, the ratio will be 7:9. Find the present age of A.

A. 30 years

B. 35 years

C. 20 years

D. 25 years

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Correct Answer: Option D

Explanation:
Let ages 5x, 7x. (5x+10)/(7x+10) = 7/9 → 45x+90 = 49x+70 → 4x=20 → x=5, A=25.

This question belongs to: Maths Percentage

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