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16 October, 01:52

Each pail of plaster covers 90 square feet of ceiling. What is the least number of pails of plaster you would need to buy to cover the ceiling of a room with walls 14 feet long?

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  1. 16 October, 05:34
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    The area of the ceiling:

    A = 14² = 196 ft²

    We need plaster to cover 196 ft².

    196 : 90 = 2.17778

    Answer: We have to buy 3 pails of plaster.
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