Ronald and Elan are working on an assignment. Ronald takes 6 hrs to type 32 pages on a computer, while Elan takes 5 hrs to type 40 pages. How much time will they take, working together on two different computers to type an assignment of 110 pages?\nOptions:\n(A) 8 hrs 85 min\n(B) 8 hrs 18 min\n(C) 8 hrs 15 min\n(D) 6 hrs 15 min\n(E) 3 hrs 15 min Stream of consciousness first, then make a decision:
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Number of pages typed by Ronald in 1 hour = 32/6 = 16/3\nNumber of pages typed by Elan in 1 hour = 40/5 = 8\nNumber of pages typed by both in 1 hour = (16/3 + 8) = 40/3\nTime taken by both to type 110 pages = (110 * 3/40) = 8 1/4 = 8 hrs 15 min
Thus, the answer is (C).
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