A train 120 meters long is running at a speed of 54 km/h. How long will it take to cross a platform 180 meters long? MCQ with Answer and Explanation

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A train 120 meters long is running at a speed of 54 km/h. How long will it take to cross a platform 180 meters long?

A. 18 seconds

B. 24 seconds

C. 22 seconds

D. 20 seconds

Answer: Option D

Solution (By JKSSB Mock Tests)

Speed of train = 54 * (5/18) = 15 m/s. Total distance = 120 + 180 = 300 meters. Time taken = 300 / 15 = 20 seconds.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A train 140 meters long passes a platform 160 meters long in 15 seconds. Find the speed of the train in km/h.

A. 60 km/h

B. 72 km/h

C. 90 km/h

D. 80 km/h

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Correct Answer: Option B

Explanation:
Total distance = 140 + 160 = 300 meters. Speed = 300 / 15 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A person walks from home to school at 4 km/h and arrives 5 minutes late. If he runs at 5 km/h, he arrives 4 minutes early. Find the distance.

A. 3.0 km

B. 3.5 km

C. 2.5 km

D. 4.0 km

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Correct Answer: Option A

Explanation:
Time difference = 5 - (-4) = 9 minutes = 9/60 = 0.15 hours. Let distance be d. d / 4 - d / 5 = 0.15 => d / 20 = 0.15 => d = 3 km.

This question belongs to: Maths Time Speed and Distance

Question #3

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A person row a boat 30 km downstream in 3 hours and returns upstream in 5 hours. Find the speed of the current.

A. 3.0 km/h

B. 2.5 km/h

C. 1.5 km/h

D. 2.0 km/h

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Correct Answer: Option D

Explanation:
Downstream speed = 30 / 3 = 10 km/h. Upstream speed = 30 / 5 = 6 km/h. Speed of current = (10 - 6) / 2 = 2 km/h.

This question belongs to: Maths Time Speed and Distance

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