Question

A train 100 metres long crosses a platform in 30 seconds, traveling at a speed of 36 km/h. Find the length of the platform.
170 m
140 m
160 m
200 m​

Answer 1

Step-by-step explanation:

First convert 36 km/hr into m/s =36×5/18 =10 m/s

Time taken by the train to cross the pole or tower =distance covered by the train to cross it/speed of train

As distance covered by the train in this case will be equal to the length of train. As we say train has crossed the pole or tower only when first the last end of the train has crossed the pole.

Hence time=100/10 =10

hope it helps you

Answer 2

Answer:

The length of the platform is 200m

Step-by-step explanation:

convert 36 km/hr to m/s first: 365/18 = 10 m/s

Time taken by the train to cross the pole or tower equals the distance travelled and the train's speed

The train's travel distance in this instance will be equal to its length. As we say, a train has only crossed a pole or tower when its last end has done so first.

So, time = 100/10 = 10.

And speed= distance/time

distance=speed*time

distance=10*30=300

But the train is 100m long

Which means the length of the platform=distance-length of train

Length of platform=300-100=200

Hence, The length of the platform is 200m.

The speed formula can be defined as the rate at which an object covers some distance. Speed can be measured as the distance traveled by a body in a given period of time. The SI unit of speed is m/s. In this section, we will learn more about the speed formula and its applications.

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