SOLUTION: a car travels a certain distance with a speed of 50km/h and return with a speed of 40 km/h calculate the average speed of the whole journey

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Question 754130: a car travels a certain distance with a speed of 50km/h and return with a speed of 40 km/h calculate the average speed of the whole journey
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
a car travels a certain distance with a speed of 50km/h and return with a speed of 40 km/h calculate the average speed of the whole journey
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Avg = 2*50*40/(50 + 40)
= 400/9 km/hr
=~ 44.444 km/hr
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You can assign any distance and work it out, eg d = 200 km to make it integers.