Question

a boy has covered 40km in 2hrs?calculate it's speed in m/s​

Answer 1

First, let's find his speed in km/h:

s = 40 km

t = 2 hr

⇒ v = s/t = 20 km / h

To convert km / h to m / s we always multiply the speed in km/h by 5/18.

∴ The speed of the boy in m/s = 20 * 5/18 = 50 / 9 ≈ 5.56 m /s

Answer 2

Explanation:

Speed =Distance Travelled/Time t

=40/2

=20 km/h

=20×1000/3600

=100/18 m/s