Question
A and B can do a work in 10 days and 40 days,
respectively. How long will it take together to complete the work?Solution
Work rates: A = 1/10 per day B = 1/40 per day Combined rate = 1/10 + 1/40 = 4/40 + 1/40 = 5/40 = 1/8 Time = 1 ÷ (1/8) = 8 days
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