SOLUTION: it takes a boat 9 hours to go a distance of 270 miles against the current and 3 hours to make the return trip with the current. Find the rate of the current

Question 744508: it takes a boat 9 hours to go a distance of 270 miles against the current and 3 hours to make the return trip with the current. Find the rate of the current
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
it takes a boat 9 hours to go a distance of 270 miles against the current and 3 hours to make the return trip with the current. Find the rate of the current
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Against current:
rate = 270/9 = 30 mph
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With current:
rate = 270/3 = 90 mph
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Equations:
b + c = 90 mph
b - c = 30 mph
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2b = 120
b = 60 mph
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Solve for "c":
b + c = 90
60 + c = 90
current = 30 mph
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Cheers,
Stan H.
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