Question

Help pictures included

Answer 1

Hi,


Formula to calculate the surface area of cylinder:


`a = 2 * \pi * r * h + 2 * \pi * {r}^(2)`

Solving:


`a = 2 * \pi * 2 * 5 + 2 * \pi * {2}^(2) \\ a = 2 * \pi * 10 + 2 * \pi * 4 \\ a = 6.28 * 10 + 6.28 * 4 \\ a = 62.8 + 25.12 \\ a = 87.92 / 3.14 \\ a = 28\pi`

Answer: B


Hope this helps.
If you have any questions left feel free to ask.
r3t40