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A Cruise Boat Travels 36 Miles Downstream in 3 Hours $9 \mathrm{mph}$

Question 78

Multiple Choice

A cruise boat travels 36 miles downstream in 3 hours and returns to its starting point upstream in 6 hours. Find the speed of the stream.

A) $9 \mathrm{mph}$
B) $21 \mathrm{mph}$
C) $12 \mathrm{mph}$
D) $3 \mathrm{mph}$

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