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21.
You work for a carpet cleaning
service and must shampoo the
carpet in the small banquet room
of a local hotel. The dimensions of
the room are 200 feet by 180 feet.
Each bottle of carpet shampoo can
be used to shampoo 320 square
feet of carpet. How many bottles
of shampoo do you need to
complete the job?


Sagot :

Working out:

200 * 180 = 36 000
So the room is 36 000 square feet.

36 000 / 320 = 112,5
You would need 112.5 bottles, but since you can’t get 0.5 bottle, you have to get 113 bottles.

Answer:
113 bottles