Jim paddles from one shore of a lake 3 miles wide at 4 mph, and John paddles from the opposite shore at 5 mph. How long will they travel before they meet?
They will travel 20 minutes before they meet.
The space between them is shrinking at the rate of (4 + 5) = 9 mph.
The lake is 3 miles wide, so the space between them starts out at
3 miles, and shrinks to zero in 3/9 = 1/3 of an hour = 20 minutes. [
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Asked 4/12/2019 9:03:30 PM
Updated 7 days ago|5/6/2026 10:20:53 AM
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