Question

a boy travels from A to B with a speed of 10 kilometre per hour and then from B to a speed of 20 km per hour find the average speed of the boy for this trip​

Answer 1

Vav=2v1v2/(v1+v2)------->distance same..

=400/30

=13.33 km/h=correct answer

sorry....

i was confused....

Answer 2

the average speed of the boy for this trip is 13.33 km/h