Question

If a 260m long train passes a telegraphic pole at a uniform speed in 4 sec, find speed of the train in km/hr.

Answer 1

speed =distance/time
distance=in (km)=2.6km
speed=0.04hr(in hr)

speed=65km/hr

Answer 2

The speed of the train is 3.9 km/hr.

Given:

Train length, 260 m

Time, t = 4 sec

To Find:

The speed of the train.

Solution:

We are required to find the speed of the train in km/hr

It is given that the train passes a telegraphic pole which means the total distance traveled is equal to the train length

Distance traveled, d = 260m

Time, t = 4 sec

Speed of the train = distance traveled / time -------(1)

Substitute the value of distance traveled and time in equation(1) we get

Speed of the train, v = 260/4

v = 65 m/s

The above answer is in m/s is converted to km/hr by multiplying

v = (65×60)/1000

v = 3900/1000

v = 3.9 km/hr

Therefore, The speed of the train is 3.9 km/hr.

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