Question

A body covers half the distance at a speed 4m/s and the remaining half at a speed of 6m/s.What is the average speed of the body?

Answer 1

Let total distance be 2x meters
For the first half
d1 = x metres
s1 = 6 m/s
t1 = d1/s1 = x/6 s

For the second half
d2 = x metres
s2 = 4 m/s
t2 = d2/s2 = x/4 s

Now,
Average speed = Total distance travelled / Total time
= 2x m/ (x/6 + x/4)s
= 2x / 5x/12  m/s
= 4.8 m/s

Answer 2

Answer:

4.8 m/s

Explanation:

Explanation is in the picture.

Hope this helps!!