Question

If $2\pi rh=2\pi r^2$ and $h=5$, then r is equal to

• A. 5
• B. 110
• C. 15
• D. 12

Answer 1

The correct option is A 5

$2\pi rh=2\pi r^2$
$2\pi \times r\times 5=2\pi r^2$ or $r=5$