Question

A man moves from station A to B with speed 5 km/hr for half time and with speed 15 km/hr for remaining half time.The average speed of the man over entire journey is

Answer 1

Answer :

Given that, A man moves from station A to B with speed 5kmph for half time and with speed 15kmph for remaining half time$.$

We have to find average speed of man during entire journey$.$

If a particle moves in two equal intervals of time at different speed V1 and V2 respectively, then average speed of particle is given by

• Vav = (V1 + V2) / 2

⇒ Vav = (V1 + V2) / 2

⇒ Vav = (5 + 15) / 2

⇒ Vav = 20 / 2

⇒ Vav = 10kmph

Answer 2

Answer:

10 kmph

Explanation: