Question

A man travels with a speed of 1m/s for 1min and in next 1min with speed of 3m/s in straight line calculate the average speed in km/h

Answer 1

Explanation:

1m/s=18/5kmph

d=18/5*1/60

=3/25km

d'=54/5*1/60

=9/50km

AVG speed =3/10÷1/30=9kmph