Question

Whitney buys a coffee in a cylindrical cup with a cardboard sleeve so the cup isn't too hot to hold.If the Disneyer of the sleeve is 5 inches and height of the sleeve is 4 inches, what is the surface area of the cardboard of the sleeve?Round to nearet tenths

Answer 1

`\begin{gathered} \text{ Since the disneyer of th sleeve is 5 inches, the radius is 2.5 inches!,thus} \\ \text{the perimeter is }2\pi(2.5)=5\pi\text{ inches} \\ \text{Now, the area is} \\ \\ 4\cdot5\pi=20\pi \\ =62.83\text{ in}^2 \end{gathered}`