A train 100 meters long running at 54 km/h passes a standing pedestrian. Find the time taken to cross. MCQ with Answer and Explanation

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A train 100 meters long running at 54 km/h passes a standing pedestrian. Find the time taken to cross.

A. 7.2 seconds

B. 8.0 seconds

C. 6.0 seconds

D. 6.66 seconds

Answer: Option D

Solution (By JKSSB Mock Tests)

Speed of train = 54 * (5/18) = 15 m/s. Time taken = 100 / 15 = 6.66 seconds.

This question belongs to: Maths Time Speed and Distance

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Question #1

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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. 64 km/h

B. 70 km/h

C. 54 km/h

D. 60 km/h

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Correct Answer: Option D

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

Question #2

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A train 110 meters long passing a platform 290 meters long requires exactly 20 seconds. What is the speed of the train in km/h?

A. 76 km/h

B. 72 km/h

C. 68 km/h

D. 82 km/h

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Correct Answer: Option B

Explanation:
Total distance = 110 + 290 = 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

Question #3

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A car maps a course distance of 240 km at an average speed of 60 km/h and handles the return trip at 40 km/h. Find the combined average speed.

A. 46 km/h

B. 52 km/h

C. 48 km/h

D. 50 km/h

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Correct Answer: Option C

Explanation:
Average Speed = 2xy / (x + y) = (2 * 60 * 40) / (60 + 40) = 4800 / 100 = 48 km/h.

This question belongs to: Maths Time Speed and Distance

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