a car travels from station A to station B at 30 km per hour during IT returns trip to A it travels at 30 kilometres for her for 1st half of distance and at 70 KM for next half distance find the average speed of the car find the also its average velocity
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Explanation:
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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