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? MCQ with Answer and Explanation

Question

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. 18 minutes

C. 15 minutes

D. 12 minutes

Answer: Option C

Solution (By JKSSB Mock Tests)

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

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Question #1

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A train 150 meters long completely passes a station pole sign in 6 seconds flat. Find its speed in km/h.

A. 100 km/h

B. 90 km/h

C. 110 km/h

D. 80 km/h

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Correct Answer: Option B

Explanation:
Speed of train = 150 / 6 = 25 m/s. Converting to km/h = 25 * (18/5) = 90 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A passenger locomotive 120 meters long clears a point tracker in 6 seconds flat. How long will it take to pass a platform bridge 300 meters long?

A. 27 seconds

B. 18 seconds

C. 24 seconds

D. 21 seconds

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Correct Answer: Option D

Explanation:
Speed of train = 120 / 6 = 20 m/s. Total distance to clear platform bridge = 120 + 300 = 420 meters. Time taken = 420 / 20 = 21 seconds.

This question belongs to: Maths Time Speed and Distance

Question #3

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A person covers a distance in 40 minutes if he drives at an average speed of 45 km/h. At what speed must he drive to reduce the time of journey to 30 minutes?

A. 60 km/h

B. 64 km/h

C. 54 km/h

D. 70 km/h

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Correct Answer: Option A

Explanation:
Distance is constant, so S1 * T1 = S2 * T2 => 45 * 40 = S2 * 30 => S2 = (45 * 40) / 30 = 60 km/h.

This question belongs to: Maths Time Speed and Distance

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