Question

A car moving on straight road covers one third of distance with speed 20 km per hour and rest with speed 60 km per hour average speed of car is

Answer 1

20 km x 1/3 = 60km
now,
60 km x 1/4= 20 km
60 km + 20 km = 80
the car travel 400 m in 1 min
then avs is 400 x 60 = 2.4 km

Answer 2

avg. speed will be 36 km/hr. Check the image for solution.