SOLUTION: 3. If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are _______

SOLUTION: 3. If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ________? a. 7 &1

Question 715110: 3. If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ________?
a. 7 &16 mph b. 7&17 c. 6 &17 mph d. 6 &18 e. none

Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively
-------------
Find the 2 groundspeeds (speed wrt Earth)
The boat's speed is the average of the 2.
The current is the difference between boat speed and groundspeed.

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