# Geometry

Find the radius of a right cone with slant height of 21 m and surface area of 232pi..

1. 👍 0
2. 👎 0
3. 👁 164
1. if the lateral area is 232pi, then

pi rs = 232pi
rs = 232
s^2 = r^2+h^2, so
s = √(r^2+441)

r√(r^2+441) = 232
r = 9.97

So, let's say r=10. Then

a = 10√541 = 232.6

If the total area is 232pi, then use the adjusted formula for that.

1. 👍 0
2. 👎 0
posted by Steve
2. What is rs

1. 👍 0
2. 👎 0

## Similar Questions

1. ### Maths

If a cone of radius r and slant height 2r is surmounted on a cone having radius 2r and slant height 4r then find total surface area of solid

asked by Sanjay on December 8, 2017
2. ### Algebra 1--How 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 =

asked by Victoria on May 27, 2014
3. ### math

I need some help, Find the surface area of the cone. Use 3.14 for π This is a cone with a: Radius 8in Slant Height 7in

asked by Kal on March 19, 2019
4. ### Math

What is the surface area and volume of a composite figure made up of a hemisphere and a cone in terms of pi? The radius is 10, and the slant height is 15. Are my answers right? Cone surface area: π(10)(15) = 150π Hemisphere

asked by Anonymous on May 26, 2015
5. ### geometry

1. What is the lateral surface area of a square pyramid with side length 11.2 cm and slant height 20 cm? 224 cm2 448 cm2 896 cm2 2508.8 cm2 2. What is the lateral surface area of a cone with radius 19 cm and slant height 11 cm? 19

asked by lilman on April 18, 2012
6. ### Mathematics

solid is in the form of a cone mounted on himispher in such away that the Venter of the base of the cone fast coincide with the center of the base of the hemisphere.the radius of hemisphere and height of cone are r each ,radius of

asked by Okram gojen on March 3, 2019
7. ### Geometry

Find the radius of a right cone with a slant height of 22 and surface area of 168pi

asked by Illeana on April 14, 2016
8. ### Algebra

Find the radius of a right cone with slant height 21 m and surface area 168pi m2

asked by Angelita Marie on April 10, 2008
9. ### Geography

find the radius of a right cone with slant height of 21 m and surface area of 232

asked by Anonymous on April 28, 2016
10. ### Geometry

Find the radius of a right cone with the slant height 21m and the surface area 168pi m^2

asked by Help me!! on April 14, 2008

More Similar Questions