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It takes the average dryer 80 minutes to dry one full load of Bob's laundry. Bob has one average dryer and also decides to try one "Super Jumbo-Iron Dryer-Matic", which is faster than the average dryer by a ratio of 5: 4. Bob has three loads of laundry, and both machines are so precise that he can set them to the minute. How many minutes does it take for him to dry his three loads? (Assume that no time passes between loads and that he can use both machines concurrently. Assume also that he never runs a machine with less than a full load. Finally, assume that Bob does not partially dry a load in one machine and then switch it to the other.)
(A) 128 min
(B) 130 min
(C) 132 min
(D) 125 min
(E) 121 min
Answer: A
Source: Manhattan GMAT
(A) 128 min
(B) 130 min
(C) 132 min
(D) 125 min
(E) 121 min
Answer: A
Source: Manhattan GMAT
