Question 22
Sally must wash and then dry one shirt, one dress and one pair of shorts. She has one washing machine and one dryer. Each machine handles only one item at a time. She may choose the order. What is the least total time, in minutes, to finish all three items?
Times: shirt washing 4, drying 2; dress washing 8, drying 6; shorts washing 3, drying 9 minutes.
The two machines may run simultaneously on different items. Each item must finish washing before drying, and its wash/dry cycle is uninterrupted; transfer time is zero.
Input: enter a whole number without units; leading zeroes from the paper answer grid may be omitted.
Times: shirt washing 4, drying 2; dress washing 8, drying 6; shorts washing 3, drying 9 minutes.
The two machines may run simultaneously on different items. Each item must finish washing before drying, and its wash/dry cycle is uninterrupted; transfer time is zero.
Input: enter a whole number without units; leading zeroes from the paper answer grid may be omitted.