Asked by Raquel
A motorboat travelling at full speed against a current goes 15 miles in one hour. Travelling at half speed with the current, it goes 12 miles in an hour. Find the rate of the current.
Answers
Answered by
Henry
Eq1: Vm - Vc = 15.
Eq2: 0.5Vm + Vc = 12.
Sum: 1.5Vm = 27, Vm = 18 mi/h.
In Eq1, replace Vm with 18 and solve for Vc.
Eq2: 0.5Vm + Vc = 12.
Sum: 1.5Vm = 27, Vm = 18 mi/h.
In Eq1, replace Vm with 18 and solve for Vc.
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