Question

5.(11.07 MC) It takes a total of 3 hours to wash every window on a building. There are 30 windows. How many minutes does it take to wash just one window?(​

Answer 1

6 minutes

Step-by-step explanation:

Since the answer most certainly would be some number of MINUTES, I changed "3 hours" to minutes. (60 min. in an hour x 3 hrs. = 180 minutes.)

Then, set up the equation:

180 min. x min.

-------------- = --------------

30 windows 1 window

30x = 180

x = 6

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OR ...... you could have simply thought that 30 windows in 3 hours means the same as 10 windows in 1 hour. (30 divided by 3).

Then, that means 10 windows in 60 minutes, which is, 6 minutes. (60 divided by 10.)