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. 60 kmph

B. 66 kmph

C. 54 kmph

D. 72 kmph

Answer: Option D

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 compound interest on a sum for 2 years at 10% per annum is Rs. 525, find the sum.

A. Rs. 2500

B. Rs. 2000

C. Rs. 2200

D. Rs. 2400

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Correct Answer: Option A

Explanation:
CI = P[(1.1)² - 1] = 0.21P = 525 → P = 2500.

This question belongs to: Maths Percentage

Question #2

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In 60 L of milk-water mixture, water is 10%. How much water must be added to make water 25%?

A. 12 L

B. 6 L

C. 8 L

D. 10 L

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Correct Answer: Option A

Explanation:
Water = 6 L, milk = 54 L. For water 25%, milk 75%, total = 54/0.75 = 72 L, add 12 L.

This question belongs to: Maths Percentage

Question #3

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The price of a commodity is increased by x% then decreased by x%. Net decrease is 4%. Find x.

A. 20

B. 10

C. 25

D. 15

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Correct Answer: Option A

Explanation:
(1+x/100)(1-x/100) = 0.96 → 1 - x²/10000 = 0.96 → x² = 400 → x = 20.

This question belongs to: Maths Percentage

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