Question

a car
travel along a straight line for first half time
with speed 40 km/hr and the second half time with speed
60 km/hr. Find the average speed of the car.​

Answer 1

Explanation:

Let total time is 2T hrs

for first half time(Thrs) , speed =40km/hr

so ditance =40T

for next T hrs distance=60T

Average speed =total distance/total time=60T+40T/2T =100T/2T/50km/hr