Question

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

Answer 1

To determine how much of the wall is blue we first need to find its area. The wall is a rectangle, then its area is the product of its height and length:

`\begin{gathered} A=(8(2)/(5))(16(2)/(3)) \\ A=((42)/(5))((50)/(3)) \\ A=(14)(10) \\ A=140 \end{gathered}`

Hence, the area of the wall is 140 square ft. To determine how much of the wall is already painted we multiply this by 1/2, then:

`(140)((1)/(2))=70`

Therefore, 70 square ft are blue.