Question

A tarin 700 m in 35 seconds. What is its speed in km/h?

Answer 1

Answer:

1km/50s

=2km/minutes

Answer 2

Answer:

72 km/hr

Step-by-step explanation:

The speed of the train in m/s = 700m/35s

The speed of the train in km/hr = 700m/35s * 18/5

Because if we convert 1 hour into min you will get 60 min and if you will convert 60 min to sec you will get 3600 sec

If you will convert 1km to m you will get 1000m

Formula of Speed = Distance / Time

                              = 1000/3600

                              = 5/18

If we have to convert m/s to km/hr  

Then -:

Divide 5/18 by 700m/35s

=> 700/35  /   5/18

Reciprocal of 5/18 is 18/5

Therefore 700/35 * 18/5

Cut 700 and 35

20 * 18/5

Now cut 5 and 20

Therefore you will get 4*18

Speed in km/hr = 72km/hr