Question

A car has to cover the distance of 60km if half of the total time it travels with speed 80 km per hour and in rest half time its speed becomes 40 km per hour the average speed of car will be

Answer 1

Answer:

Vav = 80 + 40 / 2

      = 120/2

      = 60 km /h

Explanation:

Answer 2

Answer:

average speed = (v-u)

= (80-60m)

=20ms

=40+2o

=60ms