Asked by Jessica

jim paddle from one shore of a lake three miles wide at 4 mph, and john paddles from the opposite shore at 5 mph. how long will they travel before they meet?
Answered by Henry
r1*t + r2*t = 3 Mi.
4t + 5t = 3
9t = 3
t = 3/9 = 1/3 h. = 20 min.