A train 130 meters long passes a platform 270 meters long in 20 seconds. What is the speed of the train in km/h? MCQ with Answer and Explanation

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A train 130 meters long passes a platform 270 meters long in 20 seconds. What is the speed of the train in km/h?

A. 80 km/h

B. 72 km/h

C. 60 km/h

D. 90 km/h

Answer: Option B

Solution (By JKSSB Mock Tests)

Total distance = 130 + 270 = 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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A man rows a distance of 12 km downstream in 1.5 hours and returns upstream in 3 hours. Find the speed of the river current.

A. 2.5 km/h

B. 1.8 km/h

C. 2.0 km/h

D. 2.2 km/h

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Correct Answer: Option C

Explanation:
Downstream speed = 12 / 1.5 = 8 km/h. Upstream speed = 12 / 3 = 4 km/h. Speed of current = (8 - 4) / 2 = 4 / 2 = 2 km/h.

This question belongs to: Maths Time Speed and Distance

Question #2

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A train running at 60 km/h crosses a bridge 200 meters long in 24 seconds. Find the length of the train.

A. 200 meters

B. 220 meters

C. 180 meters

D. 240 meters

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Correct Answer: Option A

Explanation:
Speed = 60 * (5/18) = 50/3 m/s. Total distance in 24 seconds = (50/3) * 24 = 400 meters. Length of train = 400 - 200 = 200 meters.

This question belongs to: Maths Time Speed and Distance

Question #3

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A sedan tracks from location M to N at 50 km/h and manages the return tract to M at 70 km/h. What is the average speed recorded across the round journey?

A. 60.00 km/h

B. 56.50 km/h

C. 58.33 km/h

D. 61.25 km/h

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Correct Answer: Option C

Explanation:
Average Speed across course = 2xy / (x + y) = (2 * 50 * 70) / (50 + 70) = 7000 / 120 = 58.33 km/h.

This question belongs to: Maths Time Speed and Distance

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