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?
A. 13 hour
B. 12 hour
C. 11 hour
D. 9 hour
E. 10 hour
Answer: Option B
Solution (By Examveda Team)
Number of page copied by (Subhash + Prakash) in 1 hour = $$\frac{{300}}{{40}}$$ = 7.5 pages; Subhash copied pages in one hour = $$\frac{{50}}{{10}}$$ = 5 pages Hence, Prakash copied pages in one hour = 7.5 - 5 = 2.5 Thus, Prakash can copied 30 pages in = $$\frac{{30}}{{2.5}}$$ = 12 hourThis Question Belongs to Arithmetic Ability >> Time And Work
takes 10 days less than the time taken by B to finish a piece of work. If both A and B can do it in 12 days, then the time taken by B alone to finish the work is ?