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- A 300 meters long train crosses a platform in 39 seconds
- A train takes 18 seconds to pass completely through a station
Explanation
“A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds”; The statement indicates:
Train passes a man in 20 seconds with a speed of 54 km/h so;
length of the train = speed x time
Train passes a station platform in 36 seconds with a speed of 54 km/h; it means total length = speed x time which leads to find out the length of the platform.
To Find
Length of the platform = ?
Solution
Time required to pass a man = 20 seconds
Speed in m/sec = (54 x 1000)/3600
Speed in m/sec = 15 m/sec
Now; length of train = speed x time
length of train = 15 x 20
length of train = 300 m
Let suppose
length of the platform = y
so, total length = y + 300
again, using the formula for total length;
total length = speed x time
y + 300 = 15 x 36
y = 540 – 300
y = 240 meter answer
Conclusion
A train passes a station platform in 36 seconds and a man standing on the platform in 20 seconds. If the speed of the train is 54km/h, then the length of the platform will be 240 meter.
