Question 1178679
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The area of the four walls is  2*(11*10+12*10) = 460 square feet.


Number of gallons is  {{{460/(250*300)}}} = 0.006, according to the given input data.


Round it to 1 gallon (= 1 can).    <U>ANSWER</U>
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Solved and answered.



The info about the price per gallon is EXCESSIVE and non-necessary.