Question

A train moving at a speed of 80 kilometre per hour crosses a pole in 7 seconds find the length of the train

Answer 1

Step-by-step explanation:

The train moving at a speed of 80 km/hr covers 80*1000/3600 = 22.22 m/s. It the train crosses the pole in 7 seconds, the train is 22.22*7 = 155.55 m long.

Answer 2

Hi,

Here is your answer

Given:

Speed of train=80km/hr=22.2m/s

Time taken=7s

To Find:

Length of the train=Distance travelled

Solution:

Distance is given by the formula

Distance=Speed×Time

Substituting the given datas in the equatio

We get,

Distance=22.2×7

Distance=155.4m

Since distance travelled=Length of the train,

Length of the train=155.4m

Notes:

1. Remember to convert all the given datas to the SI units before calculating.

2. Speed is a scalar quantity. It's unit is m/s

Hope this helps you.