Question

A car passes through a street 200 metres long in 18 seconds. How many kilometer per hour is it travelling

Answer 1

distance=200m=.2km
time=18sec=18/3600=1/200=0.005hrs
speed=distance/time
           =.2/.005=2/.05=200/5
                 =40km/h

Answer 2

Answer:

distance=200m

=2 km

time=18 sec

=18/3600

=1/200

=0.005

speed=d/s

=2/.005

=200/5

=40 km/hr