Question

a car mover for half of its time at 8 km/h and for rest half of time at 40 km/h . total distance covered is 60 km. what is the average speed of the car

Answer 1

avg speed = 2xy/x+y
x, y are speeds
x=8,y=40
avg speed= 2×8×40/40+8
avg speed = 640/48
= 40/3
= 13.33 is answer