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george drove to two town at 60 miles per hour and drove back home at 30 miles per hour. what is the distance to town if the whole trip took 9 hours hrs

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time to get there = d/60
time to get back = d/30
so
d/60 + d/30 = 9

3 d/60 = 9

d = 3 * 60

180 miles

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