Answer:
Step-by-step explanation:
Formula
d = r * t
Givens
Let his speed in still water = x
The trick to this question is that the distance is the same both ways.
time with the current = 2 hours.
Time against the current = 3 hours
rate of the current (it's always the same) 2 mph
d = (x + 2)*2 going with the current
d = (x - 3)*3 going against the current.
(x + 2)*2 = (x - 3)*3 Remove the brackets.
2x + 4 = 3x- 9 Add 9 to both sides.
2x + 4 + 9 = 3x Combine
2x + 13 = 3x Subtract 2x from both sides.
13 = 3x - 2x
13 = x
So his boat would go 13 mph is still water.
So sin
