Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and beginning April 20th, 2021 (Eastern Time) the Yahoo Answers website will be in read-only mode. There will be no changes to other Yahoo properties or services, or your Yahoo account. You can find more information about the Yahoo Answers shutdown and how to download your data on this help page.
Trending News
Can someone help me find the surface area for a right cylinder?
A right cylinder has a radius of 4 and a height of 11. What is its surface area?
A. 88pi units^2
B. 60pi units^2
C. 120pi units ^2
D. 152pi units ^2
3 Answers
- DWReadLv 76 years ago
circumference of cylinder = 2πr = 8π units
lateral area = 8πh = 88π units²
base area = πr² = 16π units²
top area = base area = 16π units²
total surface area = 88π + 16π + 16π = 120π units²
- Wayne DeguManLv 76 years ago
Ahh...you mean total surface area??
so, 2πr² + 2πrh => 2π(4)[4 + 11] units²
i.e. 2π(60) => 120π units²
:)>
- ComoLv 76 years ago
A = 2 π r ² + 2 π r h
A = 2 π r [ r + h ]
A = 8 π [ 15 ]
A = 120 π units²______Option C
