SOLUTION: A car cut off the first third of the distance at 80 km / hour. Then cut the second third at 24 km / hour. While the final third made at 48 km / hour. How was the average speed of t

Question 479752: A car cut off the first third of the distance at 80 km / hour. Then cut the second third at 24 km / hour. While the final third made at 48 km / hour. How was the average speed of the car in the entire distance??
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
A car cut off the first third of the distance at 80 km / hour. Then cut the second third at 24 km / hour. While the final third made at 48 km / hour. How was the average speed of the car in the entire distance??
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If by "cut off" you mean traveled:
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Total time = d/80 + d/24 + d/48 were d is 1/3 of the total distance
tt = 3d/40 = total distance/40
Avg speed = 40 km/hr

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