Question

. A car moves a distance of 200 km. It covers the first half of distance at a speed of 60 km/h and the second half at a speed of v km/h. If the average speed for the entire trip is 40 km/h, find the value of v

Answer 1

Answer:

48km/h is the correct answer

Answer 2

Answer:

First half of distance = 100m

speed = 40km/h or 100/9 m/s

so time taken= 100÷ 100/9 = 9 second

Given avg speed = 48km/h = 40/3 m/s

Distance= 200m

so total time is 15s

now 9 s has passes covering 100 m. time left = 6s

Distance left = 100m

so speed(v) = 100/6

= 50/3 m/s or 90 km/h