Question

A car travel 65kms from A to B in 70 minutes and 80 km from B to C in 75 minutes.

Find the average speed in km/h of the car for the whole journey?

Answer 1

60 km/h

Explanation:

The car has traveled a total distance of 65+80 = 145 km in 70+75 = 145 minutes. Then the average speed is ...

speed = distance/time = (145 km)/(145 min)·(60 min/h) = 60 km/h

The average speed for the journey is 60 km/h.