Question

A boy walks from his home to a post office at a distance of 0.5 kilometre in 20 minutes he then returns to his home in time 25 minutes find the average speed of the boy.

Answer 1

Answer:

average speed = 22.22 m/min

Step-by-step explanation:

average of speed =

2( speed1 × speed2) ÷ (speed1+speed2)

speed 1 = 500/20 m/min = 25 m/min

speed 2 = 500/25 m/min = 20 m/min

Avg speed =

$\frac{2 \times 20 \times 25}{20 + 25} = \frac{1000}{45} = 22.22$