A train 140 meters long passes a platform 160 meters long in 15 seconds. Find the speed of the train in km/h. MCQ with Answer and Explanation

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A train 140 meters long passes a platform 160 meters long in 15 seconds. Find the speed of the train in km/h.

A. 72 km/h

B. 60 km/h

C. 80 km/h

D. 90 km/h

Answer: Option A

Solution (By JKSSB Mock Tests)

Total distance = 140 + 160 = 300 meters. Speed = 300 / 15 = 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 bicycle wheel has a radius of 28 cm. How many revolutions are mandatory to span a total course line of 880 meters?

A. 550

B. 500

C. 600

D. 450

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Correct Answer: Option B

Explanation:
Circumference = 2 * (22/7) * 28 = 176 cm = 1.76 meters. Total course line = 880 meters. Number of revolutions = 880 / 1.76 = 500.

This question belongs to: Maths Time Speed and Distance

Question #2

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A train 140 meters long passes a roadside platform 260 meters long in 20 seconds. Find the speed of the train in km/h.

A. 80 km/h

B. 76 km/h

C. 68 km/h

D. 72 km/h

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Correct Answer: Option D

Explanation:
Total distance = 140 + 260 = 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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How long will a person take to walk around a square field of side 45 meters if his speed is 9 km/h?

A. 64 seconds

B. 80 seconds

C. 72 seconds

D. 90 seconds

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Correct Answer: Option C

Explanation:
Perimeter of the square field = 4 * 45 = 180 meters. Speed = 9 km/h = 9 * (5/18) = 2.5 m/s. Time = Distance / Speed = 180 / 2.5 = 72 seconds.

This question belongs to: Maths Time Speed and Distance

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