Question

A car travel shortest distance at a speed 50 km/ hr and return at a speed 40 km/ hr . Find average speed​

Answer 1

Answer:

To complete 1km distance with speed =50kmhr it tkes time

=

50

1

,

To complete 1km distance with speed =40kmhr it tkes time t

1

=

40

1

s

Average speed=

(1/50)+(1/40)

1+1

=44.44m/s