Question

If a body covers & of distance with a speed
of 20km per hour 3 next one third covere
with 30kmph resit distance is covered with
40km/h calculate the everage speed of motion​

Answer 1

Answer:

Correct option is

B 24 m/s

Let the total distance be 2x.

For first half distance :

Speed is 20 m/s

Thus time taken t₁ = X 20

For second half distance : Speed is 30 m/s

Thus time taken t₂ X 30

Average velocity Vavg = 2x t₁ + t₂

Vavg 2x + 2 x 20 x 30 20+30 X 20 X 30

24 m/s