Question

PLEASE HELP I GIVE THANKS

Answer 1

The formula for a cylinder's surface area is :
`2\pi rh+2\pi { r }^( 2 )` in this question, h=x.

Let's plug the values in the formula


`2\pi rh+2\pi { r }^( 2 )\\ \\ 2\cdot \pi \cdot 6\cdot 8+2\cdot \pi \cdot { 6 }^( 2 )=2\cdot 48\cdot \pi +2\cdot 36\cdot \pi =96\pi +72\pi =168\pi \quad \\ \\ 168\pi \quad square\quad units\\ Answer\quad is\quad A`