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What is the average speed of the aeroplane over the entire journey?

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An aeroplane covers its outward journey at 600 kmph.

It returns, over exactly the same distance, at 400 kmph.

What is the average speed of the aeroplane over the entire journey?

posted Jan 22, 2020 by Yogeshwar Thakur

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1 Answer

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480 kmph

One way distance= d, time1= d/600, time2=d/400
Entire distance= 2d
Time=d/600+d/400
Ave speed= 2d/(d/600+d/400)= 480 kmph

answer Jan 22, 2020 by Hanifa Mammadov



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