Final answer:
The window washer cleans 12 windows per hour. At this rate, they would clean 120 windows in 10 hours.
Step-by-step explanation:
The question is asking us to calculate the number of windows a window washer can clean in a different amount of time given their initial rate of cleaning.
To find this, we calculate the rate of window cleaning per hour and then multiply this rate by the new amount of time. The window washer cleans 36 windows in 3 hours, so their rate is 12 windows per hour (36 windows divided by 3 hours).
For 10 hours, we multiply the rate of 12 windows per hour by 10 hours, resulting in 120 windows cleaned in 10 hours.