Question

A car travels 72km in an hour. Find its speed in metres per second.

Answer 1

20 m/s

Explanation:

72000 m/hr

72000 m/3600 s

20 m/s

Answer 2

20 m/s

Explanation:

=> 72 km/hr

In changing the speed from km/hr to m/s, we multiply by
`(10)/(36)`

So,

=> 72 ×
`(10)/(36)`

=> 2 × 10

=> 20 m/s