Question

a body covers half the distance with a speed of 20 metre per second and the other half with a speed of 30 metre per second the average velocity of the body during whole journey​

Answer 1

Answer:

24 metre per second

Explanation:

$v \: avg. = \frac{2 \times 20 \times 30}{ 20 + 30} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \frac{1200}{50} \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 24 \: metre \: per \: second$