Question

A car moves from X to Y with a uniform
speed vu and returns to X with a uniform
speed Vd. The average speed for this round trip​

Answer 1

Answer:

$v(u+d)/2$

Explanation:

The addition of the first and the second uniform speed all divided by 2 because of the usage of two variables. This leads to a simple factorization using the common variable (v) to give a more concise answer.