Question

A train 280m long is running at a speed of 42km/hr.How much time will it take to pass a man standing on a platform

plz z answer this question in full statement and plz z help

Answer 1

time = distance ÷ speed
here the distance is the length of train itself. = 280m.
speed = 42km/h = 42×5/18 = 35/3m/s.

time = 280 ÷ 35/3
= 280 × 3/35 = 24s.
hope it helps.............

Answer 2

Answer: 24 Second.

Given : Train of 280 m long is running at a speed of 42km/hr.

To Find : How much time will it take to pass a man standing on a platform.

Step-by-step explanation:

In order to cross the man

The train length will be the distance travel by the train which is 280m.

As given in the problem itself the speed of the train is 42km/hr.

So,if we convert it in meter per second we get,

$\frac{42 * 1000}{60 * 60}m/s = \frac{35}{3}m/s$

Now , we know that speed is equal to distance by time , so here we can apply that formula in order to get the result ,

Speed ​​is directly proportional to distance. This means that time remains constant if we have two vehicles moving two distances at two different speeds. Speed ​​is inversely proportional to time.

$Speed = \frac{Distance }{Time}\\ Time = \frac{Distance}{Speed} \\Time = \frac{280 * 3}{35}\\ Time = 24s$

∴ It will take 24 s for the train to cross that person standing on the platform .

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