<PRE><B>Question 1122629</B>
A bus travels at a rate of 120 miles per hour in going to a place and average a round trip route at 150 miles per hour. What is its average rate when it returns to its place of origin?
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r = return speed
RT Avg = 2*120*r/(120+r) = 150
240r = 150r + 18000
90r = 18000
r = 200 mi/hr
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A fast bus.

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