Problema Solution
A boat takes 4hrs to go 12 miles upstream. It can go 32 miles downstream in the same time. find the rate of the boat upstream and the rate of the boat in still water?
Answer provided by our tutors
Let
v = the rate of the boat in still water
c = the rate of the current
We will use the formula average rate = distance/time:
v - c = 12/4
v + c = 32/4
........
click here to see the system of equations solved for v and c
........
v = 5.5 mph
c = 2.5 mph
The rate of the boat upstream is 5.5 - 2.5 = 3 mph.
The rate of the boat in still water is 5.5 mph.