16-11-2018
Physics

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a car moves from a to b at a speed of 50km per hr and comes back from b to a at a speed of 30km per hour. find its average speed during the journey

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booknerd007 booknerd007

21-11-2018

You'll want to add all the trips together, then divide buy the number of trips. Average can be thought of like "in the middle".

(50 + 30) ÷ 2
80 ÷ 2 = 40.

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