Question 635312
Boat goes120 miles upstream in 20 hours and downstream in 10 hours. What is the speed of the boat and speed of the current?
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Upstream rate = 120/20 = 6 mph
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Downstream rate = 120/10 = 12 mph
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Equations:
Upstream rate: b - c = 6 mph
Downstream rate: b + c = 12 mph
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Add and solve for "b":
2b = 18 mph
boat speed = 9 mph
000
solve for "c":
b + c = 12
9 + c = 12
current speed = 3 mph
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Cheers,
Stan H.
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