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If he paints 1/2 of the wall blue, how many feet will be blue?

If he paints 1/2 of the wall blue, how many feet will be blue?-example-1
User Ncowboy
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1 Answer

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Find the area of the wall:


A=8(2)/(5)ft*18(1)/(3)ft

To multiply mixed numbers first turn it into improper fractions:


\begin{gathered} 8(2)/(5)=8+(2)/(5)=(40)/(5)+(2)/(5)=(42)/(5) \\ \\ 18(1)/(3)=18+(1)/(3)=(54)/(3)+(1)/(3)=(55)/(3) \end{gathered}
\begin{gathered} A=(42)/(5)ft*(55)/(3)ft \\ \\ A=(2310)/(15)ft^2 \\ \\ A=154ft^2 \end{gathered}

As just the half (1/2) of the wall will be paint in blue divide the area of the wall into 2:


(154ft^2)/(2)=77ft^2

Then, 77 square feet will be blue.

Answer: 77

User Karl Anka
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