SOLUTION: It took a patrol boat 5 hours to travel 60 km up a river against the current, and 3 h for the same trip with the current. Find the speed of the boat in still water and the speed of
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-> SOLUTION: It took a patrol boat 5 hours to travel 60 km up a river against the current, and 3 h for the same trip with the current. Find the speed of the boat in still water and the speed of
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Question 1185133: It took a patrol boat 5 hours to travel 60 km up a river against the current, and 3 h for the same trip with the current. Find the speed of the boat in still water and the speed of the current. Found 2 solutions by greenestamps, ikleyn:Answer by greenestamps(13200) (Show Source):
Solve the system of equations using very basic algebra....
For a less formal solution, you can reason this way:
The 20km/h is the current speed ADDED TO the boat speed; the 12km/h is the current speed SUBTRACTED FROM the boat speed.
That means the boat speed is halfway between 12km/h and 20km/h, which is 16km/h.
And then the current speed is the difference between 16km/h and either 12km/h or 20km/h, which is 4km/h.
It took a patrol boat 5 hours to travel 60 km up a river against the current, and 3 h
for the returning trip with the current.
Find the speed of the boat in still water and the speed of the current.
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It is HOW it SHOULD BE worded.
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It is a typical and standard Upstream and Downstream round trip word problem.
