Question

A body covers half of its journey with a speed of 60 ms and the other half with a speed of 40 ms-1. Then
find the average speed during the whole journey.​

Answer 1

Answer:

48 m/s

Explanation:

Avg speed = Total distance/ Total time

= S$\frac{S}{s/2* 40+s/2* 60}$

=$\frac{S}{5s/240}$

=48m/s

Answer 2

Answer:

Let the speed of 60m/s and 40m/s .

s=D/S

one min= 60sec

60×60/40

60×3= 90

so average speed during the whole journey 90m/s