A train 200 m long passes a platform 300 m long in 25 seconds. Find the speed of the train in kmph. MCQ with Answer and Explanation

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A train 200 m long passes a platform 300 m long in 25 seconds. Find the speed of the train in kmph.

A. 72 kmph

B. 54 kmph

C. 60 kmph

D. 66 kmph

Answer: Option A

Solution (By JKSSB Mock Tests)

Total distance = 200+300=500 m, time 25 sec, speed = 500/25 = 20 m/s = 20 × 18/5 = 72 kmph.

This question belongs to: Maths Percentage

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Question #1

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If the length of a rectangle is increased by 25% and the breadth is decreased by 20%, what is the percentage change in its perimeter?

A. Cannot be determined

B. 5% increase

C. 2.5% increase

D. No change

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Correct Answer: Option A

Explanation:
Perimeter change depends on the original values of length and breadth, so cannot be determined without them.

This question belongs to: Maths Percentage

Question #2

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If A is 25% less than B, then B is what percentage more than A?

A. 33.33%

B. 20%

C. 25%

D. 50%

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Correct Answer: Option A

Explanation:
Formula: (25 / 75) * 100 = (1 / 3) * 100 = 33.33%.

This question belongs to: Maths Percentage

Question #3

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A student divided a number by 2 instead of multiplying it by 2. What is the percentage error?

A. 100%

B. 50%

C. 75%

D. 60%

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Correct Answer: Option C

Explanation:
True value = 2x. False value = x/2 = 0.5x. Error = 1.5x. % Error = (1.5 / 2) * 100 = 75%.

This question belongs to: Maths Percentage

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