Question
A can copy 80 pages in 20 hours, A and B together can
copy 243 pages in 54 hours. Then in how many hours B can copy 60 pages.Solution
Number of pages copied by x in hour = 80/20 = 4
Number of pages copied by x and y in 1 hour = 243/54 = 4.5
∴ Number of pages copied by y in 1 hour = 4.5 – 4 = 0.5
∴ Required time = 0.5 x 60 = 30 hours
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