Question

A train 225m long crosses a man standing on a platform in 10 second. Find the speed of the train. How long will it take to pass a platform 405m long

Answer 1

Answer: speed = 22.5m/s

Time = 18 seconds.

Step-by-step explanation:

Speed = distance/time

= 225/10

Speed = 22.5 m/s

Now,

Time = distance/speed

= 405/22.5

= 18 seconds.

Answer 2

It will take 28 seconds to pass a platform 405m long

Step-by-step explanation:

Length of train = 225 m

Time taken by train to cross a man = 10 seconds

$speed = \frac{Distance }{Time}=\frac{225}{10}=22.5 m/s$

Length of platform = 405 m

So, Total distance traveled by train to cross platform = 405+225=630 m

Speed of train  = 22.5 m/s

So, Time taken by train to pass a platform 405m long = $\frac{Distance}{Speed}=\frac{630}{22.5}=28 seconds$

Hence it will take 28 seconds to pass a platform 405m long

#Learn more:

A train 225m long crosses a man standing on a platform in 10 second. Find the speed of the train. How long will it take to pass a platform 405m long

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