A train 160 meters long tracks at a speed of 90 km/h. How long will it take to cross a platform 240 meters long? MCQ with Answer and Explanation

A train 160 meters long tracks at a speed of 90 km/h. How long will it take to cross a platform 240 meters long?
A. 18 seconds
B. 14 seconds
C. 20 seconds
D. 16 seconds
Answer: Option D
Solution (By JKSSB Mock Tests)
Speed of train = 90 * (5/18) = 25 m/s. Total distance = 160 + 240 = 400 meters. Time taken = 400 / 25 = 16 seconds.

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Practice More Time Speed and Distance Questions

Question #1
The speeds of two cars are in the ratio 5 : 4. If they cover the same distance, and the slower car takes 2.5 hours, how much time does the faster car take?
A. 2.0 hours
B. 2.4 hours
C. 2.2 hours
D. 1.8 hours

Correct Answer: Option A


Explanation:
Ratio of speeds = 5:4, so ratio of times taken = 4:5. The slower car corresponds to 5 parts = 2.5 hours => 1 part = 0.5 hours. Time for the faster car = 4 parts = 4 * 0.5 = 2 hours.

This question belongs to: Maths Time Speed and Distance
Question #2
A man rows a boat 18 km in 4 hours downstream and returns upstream in 12 hours. Find the speed of the stream.
A. 1.5 km/h
B. 2 km/h
C. 2.5 km/h
D. 1 km/h

Correct Answer: Option A


Explanation:
Downstream speed = 18 / 4 = 4.5 km/h. Upstream speed = 18 / 12 = 1.5 km/h. Speed of stream = (4.5 - 1.5) / 2 = 1.5 km/h.

This question belongs to: Maths Time Speed and Distance
Question #3
The speed of a boat in still water is 15 km/h and the speed of the current is 3 km/h. Distance traveled downstream in 12 minutes is:
A. 3.6 km
B. 4 km
C. 2.4 km
D. 4.8 km

Correct Answer: Option A


Explanation:
Downstream speed = 15 + 3 = 18 km/h. Time = 12 minutes = 12/60 = 0.2 hours. Distance = Speed * Time = 18 * 0.2 = 3.6 km.

This question belongs to: Maths Time Speed and Distance