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Asked by Anonymous

Mr. Smith drove 90 miles one way to visit his brother. He averaged twice his original speed on the return trip than he did going to visit. If his total travel time was 3 hours, how fast was he going each way
9 years ago

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Answered by Steve
since time = distance/speed, if his original speed was x,

90/x + 90/(2x) = 3
x = 45
9 years ago

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