Hi Tommy,
Q) A washing machine takes 35 mins to wash one load of laundry, and in between washing different loads of laundry it takes Derek 2 mins to unload and another 4 mins to reload the machine. If the washing machine begins washing one load of laundry at 12:30 PM, how many loads of laundry can Derek wash and unload before 6:35 PM ?
A) 8
B) 9
C) 10
D) 14
E) 15
12:30 PM to 6:30 PM = 6 hours = 360 mins
+ additional 5 mins to 6:35 PM => 365 mins
Wash + Load + Reload = (35 mins + 2 mins + 4 mins) = 41 mins
41 * 8 = 328 => 8 full cycles
365 - 328 = 37 mins still remaining
In the solution they have considered an additional cycle (from the remaining 37 mins). But the question says before 6:35 PM
35 mins for the wash + Last 2 min to load.
But does it not coincide with 6:35 pm ? (the last 2 mins of loading).
Thanks
xero