A train 240 meters long crosses a platform 360 meters long in 30 seconds. What is the speed of the train in km/h? MCQ with Answer and Explanation

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A train 240 meters long crosses a platform 360 meters long in 30 seconds. What is the speed of the train in km/h?

A. 80 km/h

B. 72 km/h

C. 60 km/h

D. 64 km/h

Answer: Option B

Solution (By JKSSB Mock Tests)

Total distance to cross = 240 + 360 = 600 meters. Speed = 600 / 30 = 20 m/s. In km/h = 20 * (18/5) = 72 km/h.

This question belongs to: Maths Time Speed and Distance

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Question #1

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A locomotive 180 meters long crosses a modern bridge in 30 seconds. If it takes 12 seconds to pass a single post light, find the length of the bridge.

A. 320 meters

B. 300 meters

C. 250 meters

D. 270 meters

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Correct Answer: Option D

Explanation:
Speed of train = 180 / 12 = 15 m/s. Total distance in 30 seconds = 15 * 30 = 450 meters. Length of bridge = 450 - 180 = 270 meters.

This question belongs to: Maths Time Speed and Distance

Question #2

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A boat can row 15 km/h in still water. If the river current flows at 5 km/h, find the total time taken by the boat to row 40 km upstream.

A. 3 hours

B. 5 hours

C. 4 hours

D. 6 hours

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Correct Answer: Option C

Explanation:
Upstream speed = 15 - 5 = 10 km/h. Time taken = Distance / Upstream speed = 40 / 10 = 4 hours.

This question belongs to: Maths Time Speed and Distance

Question #3

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A motorboat registers a speed of 15 km/h in still water. It takes 4 hours to cover a certain distance upstream. If the stream velocity is 3 km/h, find the distance covered.

A. 56 km

B. 52 km

C. 48 km

D. 44 km

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Correct Answer: Option C

Explanation:
Upstream speed = 15 - 3 = 12 km/h. Distance = Upstream speed * Time = 12 * 4 = 48 km.

This question belongs to: Maths Time Speed and Distance

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