The value of a machine depreciates at 20% per annum. Its present value is Rs. 51200. What was its value 2 years ago? MCQ with Answer and Explanation

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The value of a machine depreciates at 20% per annum. Its present value is Rs. 51200. What was its value 2 years ago?

A. Rs. 72000

B. Rs. 80000

C. Rs. 75000

D. Rs. 85000

Answer: Option B

Solution (By JKSSB Mock Tests)

Value 2 yrs ago = 51200 / (0.8×0.8) = 51200/0.64 = 80000.

This question belongs to: Maths Percentage

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Question #1

Increase 500 by 10%. Result is:

A. 600

B. 550

C. 510

D. 505

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Correct Answer: Option B

Explanation:
500 × 1.1 = 550.

This question belongs to: Maths Percentage

Question #2

Decrease 900 by 30%. Result is:

A. 630

B. 610

C. 600

D. 620

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Correct Answer: Option A

Explanation:
900 × 0.7 = 630.

This question belongs to: Maths Percentage

Question #3

A man covers a distance at a speed of 60 kmph and returns back at a speed of 40 kmph. What is his average speed for the whole journey?

A. 55 kmph

B. 50 kmph

C. 48 kmph

D. 52 kmph

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Correct Answer: Option C

Explanation:
Average speed = 2×60×40/(60+40) = 4800/100 = 48 kmph. (Note: Not percentage but included as tough TSD).

This question belongs to: Maths Percentage

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