Question

The radius of a circular board is 3.5 meters. If the cost of paint is $4/m squared, estimate the cost of painting the board

Answer 1

Answer:$154

Explanation:

Given

the radius of the circular board is
`r=3.5\ m`

The cost of paint is
`\$4\ \text{per}\ m^2`

Area of circle
`=\pi r^2`

Area of board

`\Rightarrow A=\pi r^2\\\\\Rightarrow A=(22)/(7)* 3.5^2=38.48\ m^2`

Cost of painting

`\Rightarrow C=38.48* 4=153.95\approx \$154`