Question

A car travels from station A to station B at 30 km/h during its return trip to A, it
travels at 30 km/h for first half distance and at 70 km/h for the next half distance.
Find the average speed and average velocity of the car.

Answer 1

Answer:

Net displacement=0

So average velocity of car is zero.

Average speed = Total distance/total time taken =2x/(x/30)+(x/2)/30+(x/2)/70 =>

2x/(x/30+x/60+x/140) =>

2x/(x/30+ 200x/8400)=>2x/(x/30+x/42) =>

2x/(72x/1260)=>35 km/hr as we take total distance from A to B as x and it travels from A to B at 30km/hr and from B to A it travels half of its distance at 70km/hr and other half at 30km/hr. Hope it helps you.

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