Question

a car travels half the distance with constant velocity of 40 km per hour and the remaining half with constant velocity 60 km per hour what is the average velocity of car​

Answer 1

Let total distance be x Km.

40 km goes in 1 hr.

so, x/2   ....  x/80 hr.

Rest x/2  ....  x/120 hr.

so avg. velocity = x÷(x/80+x/120) km/.hr

                          = 48 km/hr