Question

a body covers half the journey with 4 metre per second and half of journey with 8 metre per second what is the average speed of a body​

Answer 1

average speed is total distance/ total time

4+8 equal to12

so,12/2 equal to 6m/ s

Answer 2

average speed= 2xy/ x + y

x = 4m/s

y =8m/s

Let's substitute in the formula

2 x 4 x 8/ 4 + 8

64/12

= 5.333m/s