Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions. Among the choices provided the answer should be letter C. Below is the solution:
top <span>pi r^2 or pi * 400 </span> <span>sides </span> <span>2 pi r * 60 </span> <span>40 * 60 pi </span> <span>2400pi </span>
<span>so add the top and side we get p*400 + p*2400 = 2800 pi ft^2</span>
