A can write 75 pages in 25 hrs. A and B together can write 135 pages in 27 hrs. In what time can B write 42 pages?

A can write 75 pages in 25 hrs. A and B together can write 135 pages i

1.	A can write 75 pages in 25 hrs. A and B together can write 135 pages in 27 hrs. In what time can B write 42 pages?
A.	17 hrs
B.	19 hrs
C.	21 hrs
D.	23 hrs
Answer» D. 23 hrs

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A can write 75 pages in 25 hrs. A and B together can write 135 pages in 27 hrs. In what time can B write 42 pages?

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