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Amy is painting one wall in her dining room.  The wall is 10 feet by 13 feet.  A gallon of paint covers 60 square feet. The hardware store only sells paint by the gallon, meaning that partial gallons cannot be purchased. Given this, how many gallons of paint will Amy need to purchase? Justify your answer with one complete sentence.

Feb 5, 2021

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Amy is painting one wall in her dining room.  The wall is 10 feet by 13 feet.  A gallon of paint covers 60 square feet. The hardware store only sells paint by the gallon, meaning that partial gallons cannot be purchased. Given this, how many gallons of paint will Amy need to purchase? Justify your answer with one complete sentence.

Hello Guest!

$$10\ feet\times 13\ feet:x =60\ square\ feet:1\\ 60x=130\\ x=2.1\overline 6$$

Ami has to buy 3 gallons because:

$$2\ Gallons<10\ feet\times 13\ feet\times\frac{1\ Gallon}{60\ square\ feet}<3\ Gallons$$

120 square  feet                  130 square feet              180 square feet

!

Feb 5, 2021
edited by asinus  Feb 5, 2021
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10 * 13  ft2 /  (60 ft2/gal)  = 2.167 gallons

Amy will require 2.16 gallons of paint to paint her wall but will have to buy 3 gallons because the store only sells whole gallons of paint.

Feb 5, 2021