x can copy 80 pages in 20 hours, x and y together can copy 135 pages in 27 hours. Then y can copy 20 pages in

x can copy 80 pages in 20 hours, x and y together can copy 135 pages i

1.	x can copy 80 pages in 20 hours, x and y together can copy 135 pages in 27 hours. Then y can copy 20 pages in
A.	20 hours
B.	3 hours
C.	24 hours
D.	12 hours
Answer» B. 3 hours

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x can copy 80 pages in 20 hours, x and y together can copy 135 pages in 27 hours. Then y can copy 20 pages in

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