Question

3. A car covers the first half of the distance between
two places at a speed of 40 kmh-' and the second
half at 60 kmh. What is the average speed of the
(Central Schools 07)
car?​

Answer 1

Explanation:

V1 = 40 km./h

V2 = 60 km./h

Avg. speed V = 2 V1 V2/(V1 + V2) = 2 × 40 × 60/(40 + 60) km./h = 48 km./h