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.)
How would you solve this question if switching were allowed??
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.)
How would you solve this question if switching were allowed??
