<PRE><B>Question 469091</B>
let boat speed = x
with current = x+2 mph ----- time = 10 minutes
against current = x-2 mph----time = 20 minutes

Distance = same both ways

r*t = distance

1/6(x+2)= 1/3(x-2)

3(x+2)=6(x-2)

3x+6=6x-12
6x-3x=18
3x=18
x=6

D= rt
D= 1/6 *8= 4/3 miles

D=rt
D= 1/3*4= 4/3 miles

Distance was 4/3 miles

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