Question

A car travels a certain distance from point A to B with a speed of 45 km/hr and then return to the starting point with a speed of 30km/ hr . Find the average speed and average velocity of the car.
please answer it fast
it is very urgent for me

Answer 1

Given:

• Speed of car when travelled from A-B = 45km/h
• Speed of car when returning to the initial point = 30km/h

To find:

• Average speed
• Average velocity

Solution:

Firstly finding average speed using ,

Average speed = 2V1V2/V1 + V2

Here ,

• V1 = 45km/h
• V2 = 30 km/h

Substituting we have

→ 2(45)(30)/45 + 30

→ 90(30)/75

→ 2700/75

→ Average speed = 36km/h

Now , finding average Velocity

As we know that

Average velocity = Displacement/Total time

Here , the car travelled from point A - B again returned to B - A that means , the car travelled from & returned to the same place

Then , displacement = 0 m/s

→ Average velocity = 0/time

→ Average velocity = 0 m/s

Hence , average speed = 36km/h & average velocity = 0 m/s

Answer 2