A truck driver must complete a 180-mile trip in 4 hours. If he average 50 miles an hour for the first three hours of his trip, how fast must he travel in the final hour?

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Satt Academy · Accepted Answer

30 mph - d = s x t
   = 50 x 3
   = 150
now distance left
 = 180  - 150
 = 30
thus he need s to travel 30 miles in 4th hour thus his speed should be 30 miles per hour

A truck driver must complete a 180-mile trip in 4 hours. If he average 50 miles an hour for the first three hours of his trip, how fast must he travel in the final hour?

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