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1. Subhash can copy 50 pages in 10 hours; Subhash and Prakash together can copy 300 pages in 40 hours. In how much time can Prakash copy 30 pages?
Subhash copied pages in one hour = = 5 pages
Hence, Prakash copied pages in one hour = 7.5 - 5 = 2.5
Thus,
Prakash can copied 30 pages in = = 12 hour
Solution:
Number of page copied by (Subhash + Prakash) in 1 hour = = 7.5 pages;Subhash copied pages in one hour = = 5 pages
Hence, Prakash copied pages in one hour = 7.5 - 5 = 2.5
Thus,
Prakash can copied 30 pages in = = 12 hour