Question

a car travels from the place Ato B with a speed v1 during its return journey from BtoA it's speed is v2 . then the average speed in complete journey is​ ​

Answer 1

Answer:

let speed be x

t1=x/v1

t2=x/v2

average speed=(x+x)/(t1+t2)

=2x/(x/v1)+(x/v2)