Question

A train travels 400 m in 10 seconds .Find its speed in meteres per second and kilometers per hour

Answer 1

Distance = 400m
Time = 10s
Speed = Distance/Time
= 400/10
= 40m/s
Distance in km/h = 40*5/18
= 11.11km/h
I hope, it will help you

Answer 2

The speed in meters per second and kilometers per hour is 72 kilometer per hour and 20 meters per second.

Given that,

A train covers 400 meters in only ten seconds.

We have to find calculate the speed in meters per second and kilometers per hour.

We know that,

Converting 400 m into km

1 m = $\frac{1}{1000}$ km

We get, $\frac{400}{1000}$ = $\frac{2}{5}$ km

Converting 20 s into hours

1 s = $\frac{1}{3600}$

We get, $\frac{20}{3600}$ = $\frac{1}{180}$ h

We know formula,

Speed = Distance ÷ Time

Speed = $\frac{2}{5}$ ÷ $\frac{1}{180}$

Speed =72 kilometer per hour.

Speed = 20 miter per second.

Therefore, the speed in meters per second and kilometers per hour is 72 kilometer per hour and 20 meters per second.

To learn more about kilometer visit:

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