A train passes a pole in 15 seconds and a platform 100 meters long in 25 seconds. Find the length of the train. MCQ with Answer and Explanation

A train passes a pole in 15 seconds and a platform 100 meters long in 25 seconds. Find the length of the train.
A. 180 meters
B. 150 meters
C. 200 meters
D. 120 meters
Answer: Option B
Solution (By JKSSB Mock Tests)
Let length of train be L. Speed = L / 15. Also, Speed = (L + 100) / 25. L / 15 = (L + 100) / 25 => 25L = 15L + 1500 => 10L = 1500 => L = 150 meters.

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Practice More Time Speed and Distance Questions

Question #1
A boatman logs 24 km downstream in 3 hours and the exact same route upstream in 6 hours. What is the speed of the boat in still water?
A. 6 km/h
B. 7 km/h
C. 8 km/h
D. 5 km/h

Correct Answer: Option A


Explanation:
Downstream speed = 24 / 3 = 8 km/h. Upstream speed = 24 / 6 = 4 km/h. Speed in still water = (8 + 4) / 2 = 6 km/h.

This question belongs to: Maths Time Speed and Distance
Question #2
The speeds of two bodies are in the ratio 5 : 6. If they clear the same sector distance, and the slower car takes 3 hours, how much time does the faster car take?
A. 2.6 hours
B. 2.5 hours
C. 2.2 hours
D. 2.8 hours

Correct Answer: Option B


Explanation:
Ratio of speeds = 5:6, so ratio of times taken = 6:5. Slower car takes 6 parts = 3 hours => 1 part = 0.5 hours. Time for faster car = 5 parts = 5 * 0.5 = 2.5 hours.

This question belongs to: Maths Time Speed and Distance
Question #3
Two cities A and B are 360 km apart. A car goes from A to B at 40 km/h and returns to A at 60 km/h. Find the average speed of the car.
A. 50 km/h
B. 55 km/h
C. 48 km/h
D. 52 km/h

Correct Answer: Option C


Explanation:
Average speed = (2 * 40 * 60) / (40 + 60) = 4800 / 100 = 48 km/h.

This question belongs to: Maths Time Speed and Distance