Algebra
posted by Angelita Marie .
Find the radius of a right cone with slant height 21 m and surface area 168pi m2

Does that surface area include the base?
The area of the conical portion is
A = pi* R * (slant height)
You can use that formula to solve for the radius, R
See http://www.uwm.edu/~ericskey/TANOTES/Geometry/node15.html
Respond to this Question
Similar Questions

Geometry
Find the radius of a right cone with the slant height 21m and the surface area 168pi m^2 
geometry
1. What is the lateral surface area of a square pyramid with side length 11.2 cm and slant height 20 cm? 
Algebra 1How Am I Supposed to Solve This?!
Suppose a cone and a cylinder have the same radius and that the slant height l of the cone is the same as the height h of the cylinder. Find the ratio of the cone's surface area to the cylinder's surface area. Area of cone: S = πrl … 
Math 130
Jodi says that if you double the radius of a right circular cone and divide the slant height by 2, then the surface area of the cone stays the same since the 2s cancel each other out. How do you respond? 
Math
What is the surface area and volume of a composite figure made up of a hemisphere and a cone in terms of pi? 
Geometry
How do I find the radius of a right cone with a slant of 22 and surface area of 168pi m^2? 
Geometry
Find the radius of a right cone with a slant height of 22 and surface area of 168pi 
Geography
find the radius of a right cone with slant height of 21 m and surface area of 232 
Geometry
Find the radius of a right cone with slant height of 21 m and surface area of 232pi.. 
Math
The surface area of a right cone is 55π cm squared. Find the radius if the slant height is 6cm.