A train 150 meters long is running at a speed of 90 km/h. How long will it take to cross a platform 200 meters long? MCQ with Answer and Explanation

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A train 150 meters long is running at a speed of 90 km/h. How long will it take to cross a platform 200 meters long?

A. 15 seconds

B. 16 seconds

C. 14 seconds

D. 12 seconds

Answer: Option C

Solution (By JKExamLibrary)

Speed of train = 90 * (5/18) = 25 m/s. Total distance = 150 + 200 = 350 meters. Time taken = 350 / 25 = 14 seconds.

This question belongs to: Maths Time Speed and Distance

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Question #1

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Walking at 7/9 of his usual speed, an accountant is 20 minutes late to his branch. What is his usual time to reach the destination?

A. 70 minutes

B. 60 minutes

C. 80 minutes

D. 90 minutes

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Correct Answer: Option A

Explanation:
New speed = 7/9 of usual speed => New time = 9/7 of usual time. Difference = 2/7 of usual time = 20 minutes. Therefore, 1/7 of usual time = 10 minutes => Usual time = 70 minutes.

This question belongs to: Maths Time Speed and Distance

Question #2

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A motorboat registers a speed of 15 km/h in still water. It takes 4 hours to cover a certain distance upstream. If the stream velocity is 3 km/h, find the distance covered.

A. 52 km

B. 44 km

C. 56 km

D. 48 km

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Correct Answer: Option D

Explanation:
Upstream speed = 15 - 3 = 12 km/h. Distance = Upstream speed * Time = 12 * 4 = 48 km.

This question belongs to: Maths Time Speed and Distance