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Question

A rowboat hoes 12 miles at a constant speed in 3 hours against the river current. It takes the rowboat 2 hours to go the same distance at the same speed with the current of the river. What is the speed of the rowboat and what is the current of the river?

Answer 1

d = r * t

12 = (b - c)3

12 = (b + c)2

12 = 3b - 3c

12 = 2b + 2c

Can you solve for either b or c and answer?

Answer 2

x mi/h is speed of boat and y mi/h is speed of current.Then: x + y = 12/2 = 6 and x - y = 12/3 = 4.

Then 2x = 10; x = 5 mi/h and y = 6 - 5 = 1 mi/h