Question

* A body travels first half of the distana
with a speed of u and then remaining
half of the distance with a speed of
vs what is the average speed over
the complete distance ?​

Answer 1

Answer:

with a speed of u and then remaining

half of the distance with a speed of

vs what is the average speed over

the complete dist

Answer 2

Explanation:

Let the bodytravel a distance of 2d km, total.

The first half of the distance takes d km/30 kmph = d/30 hr.

The second half of the distance takes d km/50 kmph = d/50 hr.

So the total time taken to cover 2d km = (d/30)+(d/50) = 80d/150 hr.

The average speed of the car = Total distance/ total time = 2d/[80d/150]

= 2d*150/80d

= 37.5 kmph.