Question

The distance betwen cities a and b is 120 miles a car travels from a to b at 60 miles per hour abd returns from b to a alonf the same route at 40 miles per hoir what was the average speed for the round trip

Answer 1

Answer:

A car travels from a to b at 60 miles per hour, and returns from b to a along the same route at 40 miles per hour.

The average speed for the round trip -

$s = \frac{2 \times 60 \times 40}{60 + 40} \\ s = \frac{4800}{100} = 48 \: \frac{miles}{hr}$