Question

A car covers 36km in 30minutes. find the speed of the car in km/hr and m/sec

Answer 1

Distance = 36 km = 36000 m
and, Time = 30 min = 30*60 = 1800 s
     

So, Speed = Distance/time 
                  = 36000/1800
                  = 20 m /s = 20*18/5
                  = 72 km/h

Answer 2

speed = 36/1/2=36×2=72km/hr
= 72×5/18=20m/s