SOLUTION: A motorboat traveling with the current went 72 miles in 3 hours. Against the current, the boat could only go 48 miles in the same amount of time. Find the rate of the boat in still

Algebra ->  Customizable Word Problem Solvers  -> Mixtures -> SOLUTION: A motorboat traveling with the current went 72 miles in 3 hours. Against the current, the boat could only go 48 miles in the same amount of time. Find the rate of the boat in still      Log On

Ad: Over 600 Algebra Word Problems at edhelper.com


    

Question 900375: A motorboat traveling with the current went 72 miles in 3 hours. Against the current, the boat could only go 48 miles in the same amount of time. Find the rate of the boat in still water if the rate of the current is 4 miles per hour.
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
r + c = 72/3 = 24
r - c = 48/3 = 18
2r = 42
r = 21 mph
IF
c = 4mph
r + 4 = 24
r = 20mph