A car travels a certain distance with a speed of 40 m/s and returns with a speed u. If the average speed for the whole journey is 48 m/s, what is the value of u? Ans= 60 m/s.

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Arun · Answer

Dear student Avg speed = 2x y /(x+y) 48 = 2* 40 *u/(40+u) 1920 + 48 u = 80 u 32u = 1920 u = 60 Hence u = 60 m/sec Regards Arun (askIITians forum expert)

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A car travels a certain distance with a speed of 40 m/s and returns with a speed u. If the average speed for the whole journey is 48 m/s, what is the value of u? Ans= 60 m/s.

A car travels a certain distance with a speed of 40 m/s and returns with a speed u. If the average speed for the whole journey is 48 m/s, what is the value of u? Ans= 60 m/s.

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A car travels a certain distance with a speed of 40 m/s and returns with a speed u. If the average speed for the whole journey is 48 m/s, what is the value of u? Ans= 60 m/s.

A car travels a certain distance with a speed of 40 m/s and returns with a speed u. If the average speed for the whole journey is 48 m/s, what is the value of u? Ans= 60 m/s.

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