Question

a car moving on a straight road covers a distance of 1.5 km due east in 150 second.what is the speed of the car?

Answer 1

distance covered by car=1.5km=1500m
time taken=150s
speed is given by=Distance/time
speed of car=1500/150=10m/s

Answer 2

d=1.5 km 
time=150 seconds = 150/60 hr
speed=1.5/[150/60]
          =0.6 km /hr