A can copy 75 pages in 25 hrs. A and B together can copy 135 pages in 27 hrs.

A can copy 75 pages in 25 hrs. A and B together can copy 135 pages in 27 hrs. in what time can B copy 42 pages?
(a) 18 hrs
(b) 23 hrs
(c) 21 hrs
(d) 48 hrs

Anurag Mishra Professor Asked on 13th March 2016 in Maths.
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    Answer: (c) 21 hrs 

    Anurag Mishra Professor Answered on 13th March 2016.
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