Question

How much glass is needed to make the given cup below, if it has a height of 6 inches and a radius of 1.5 inches

Answer 1

`31.5\pi`

Explanation:

Using the formula given, you can find that the surface area of the glass is:

`2\pi r^2 h+ 2\pi r^2= \\\\2\cdot \pi \cdot 1.5^2 \cdot 6+2\cdot \pi \cdot 1.5^2=\\\\27\pi + 4.5\pi=\\\\31.5\pi`

Hope this helps!