A girl rows upstream in the river that flows at the rate of

A girl rows upstream in the river that flows at the rate of 3 mph. It takes her 2 hours to row to a destination that is 2 miles away. What is the speed at which she is rowing?

Solution

Upstream DATA:
distance = 2 miles ; time = 2 hrs ; rate = d/t = 1 mph
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Equation:
Let his rowing speed be p.
p - 3 = 1
p = 4 mph
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His rowing speed in still water = 4 mph