SOLUTION: Officials begin to release water from a full man-made lake at a rate that would empty the lake in 20 weeks, but a river that can fill the lake in 30 weeks is replenishing the lake

Question 944000: Officials begin to release water from a full man-made lake at a rate that would empty the lake in 20 weeks, but a river that can fill the lake in 30 weeks is replenishing the lake at the same time. how long does it take to empty the lake?
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
Sum of the rates! The unit is LAKE per WEEKS.

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