Question

A car moves from x to y with uniform speed v1 and returns to y with a uniform speed of v2 .average speed for this round tripp is

Answer 1

Explanation:

Average is given by Total distance / total time

let'sbassume the distance between x and y is d

so, the time taken to go from x to y will be d/ v1

and , the time taken to go from y to x will be d/v2

so, the average speed will be

=2d/ d/v1+d/v2

=2d v1 v2/ v1 + v2