A train 160 meters long passes a platform 240 meters long in 20 seconds. Find the speed of the train in km/h. MCQ with Answer and Explanation

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A train 160 meters long passes a platform 240 meters long in 20 seconds. Find the speed of the train in km/h.

A. 64 km/h

B. 80 km/h

C. 72 km/h

D. 84 km/h

Answer: Option C

Solution (By JKSSB Mock Tests)

Total distance = 160 + 240 = 400 meters. Speed = 400 / 20 = 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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Excluding stoppages, the speed of a train is 80 km/h and including stoppages, it is 60 km/h. For how many minutes does the train stop per hour?

A. 20 minutes

B. 15 minutes

C. 12 minutes

D. 18 minutes

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Correct Answer: Option B

Explanation:
Stoppage time per hour = (Fast speed - Slow speed) / Fast speed = (80 - 60) / 80 = 20 / 80 = 1/4 hour. Converting to minutes = (1/4) * 60 = 15 minutes.

This question belongs to: Maths Time Speed and Distance

Question #2

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A train 200 meters long covers a telegraph post in 10 seconds. Find the time it takes to cover a bridge of 300 meters.

A. 30 seconds

B. 25 seconds

C. 20 seconds

D. 15 seconds

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Correct Answer: Option B

Explanation:
Speed of train = 200 / 10 = 20 m/s. Total distance to cross bridge = 200 + 300 = 500 meters. Time = 500 / 20 = 25 seconds.

This question belongs to: Maths Time Speed and Distance

Question #3

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A motor car finishes a journey in 10 hours. The first half is covered at 42 km/h and the second half at 48 km/h. Find the total distance of the journey.

A. 448 km

B. 450 km

C. 460 km

D. 420 km

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Correct Answer: Option A

Explanation:
Let half distance be d. d/42 + d/48 = 10 => (8d + 7d)/336 = 10 => 15d = 3360 => d = 224 km. Total distance = 2d = 448 km.

This question belongs to: Maths Time Speed and Distance

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