Question

14. A car travels the first 1/3 of a certain distance with speed of 10km/h the next 1/3 distance with a speed
of 20km/h and the last 1/3 distance with a speed of 60 km/h. The average speed of the car for whole
journey is​

Answer 1

Answer:Let the distance be 3x

Average speed = (total distance traveled) / (total time taken)

So, let times taken for the first, second and third halves of the journeys be t1, t2, and t3 respectively.