Answer:
[tex]60\pi\approx188.5in^2[/tex]
Explanation:
The party hats are cones without the base. The formula for the curved area of a cone is:
[tex]A=\pi rl[/tex]Where:
• r is the radius
,• l is the lenght of the slant heigth,
Then:
[tex]A=\pi\cdot4in\cdot5in=20\pi\approx62.83in^2[/tex]We want to make 3 of them, thus:
[tex]20\pi\cdot3in^2=60\pi in^2\approx188.5in^2[/tex]