Question

A cyclist covers a distance of 3km in 2mintue 30 second . Find speed in km/hr.​

Answer 1

1 km=1000 m

3 km=3000 m

time taken=(2*60 +30)seconds

=150 seconds

speed=distance/time

speed=3000/150

speed=20 m/s

To convert m/s into km/hr we have to multiply it by 18/5

speed=20*18/5

speed=18*4

speed=72 m/s