Question

A car travels from stop A to stop B with a speed of 30 km/hr and then returns back to A with a speed of 59 km/ hr. Find displacement , instance , average velocity , average speed

Answer 1

Answer:

Explanation:

We have to know how long it took for the round trip to find the distance

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Lets assume it took 12 hrs for the round trip

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let d = the one way distance

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Write a time equation; time = dist/speed

d%2F30 + d%2F50 = 12

multiply by 150

 

150*d%2F30 + 150*d%2F50 = 150(12)

Cancel the denominators and you have:

5d + 3d = 1800

8d = 1800

d = 1800/8

d = 225 mi one way or a total of 450 mi round trip

:

:

Confirm this find the actual time each way

225/30 = 7.5 hrs