Question
A can finish a piece of work in 12 days and B can finish
it in 20 days. If they work together, in how many days will they finish the work?Solution
A’s 1-day work = 1/12 B’s 1-day work = 1/20 (A + B)’s 1-day work = 1/12 + 1/20 = (5 + 3) / 60 = 8/60 = 2/15 Time taken together = 1 ÷ (2/15) = 15/2 = 7.5 days Answer: 7.5 days
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Each of the girls(A)/ have come(B)/ with her books.(C)
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