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A truck travels for 4 hours at an average speed of 43 miles per hour. How much longer must the truck travel at an average speed of 59 miles per hour so that the average speed for the total trip will be 50 miles per hour? (Round your answer to one decimal place.)

 Feb 24, 2020
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(4 hours *43 miles pr. hour + x hours * 59 miles pr. hour) / (4 hours + x hours) = 50

 

solve for x you get 3.111 ect. = 3.1 hours

 Feb 24, 2020

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