Question

• A man moves from a place P to Q with a constant speed of 40 m/soc.,
and then he returns back to P along the same route with a speed of
20 m/sec. then calculate the average speed of the man.
Ans. 26-6 m/sec.​

Answer 1

Answer:

See the attachment

Explanation:

Answer 2

Explanation:

let distance between P and Q be 's'

total distance = 2s

time=distance÷speed

From P to Q

s/40

From Q to P

s/20

average speed = total distance÷ total time

2s÷(s/40+s/20)

2s÷(3s/40)

s gets cancelled, you get

26.66m/s

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