Wednesday

April 23, 2014

April 23, 2014

Posted by **John** on Wednesday, June 1, 2011 at 1:00am.

- Geometry -
**Mgraph**, Wednesday, June 1, 2011 at 2:47amThe surface area

SA=Pi*r^2+Pi*r*s, s=sqrt(r^2+h^2)

500*Pi=Pi*r^2+Pi*r*sqrt(r^2+225)

500=r^2+r*sqrt(r^2+225)

500-r^2=r*sqrt(r^2+225)

(500-r^2)^2=(r*sqrt(r^2+225))^2

250000-1000r^2+r^4=r^2(r^2+225)

250000=1225r^2

r^2=250000/1225

**Related Questions**

geometry - 1. What is the lateral surface area of a square pyramid with side ...

geometry - A cylinder has a height of 16 cm and a radius of 5 cm. A cone has a ...

geometry - A cone is topped with a hemisphere. Calculate the total surface area ...

Calculas - Suppose that the radius r of a right circular cone of fixed height h...

geometry - Basic Geometry 1. Find the perimeter of a rectangle 19 cm long by 27....

Geometry - The surface area of a cone is 55 pie cm squared. The radius is 5 cm. ...

geometry - A right cylinder has a radius of 3 and a height of 12. What is its ...

Help Ms.Sue Please - 1.Find the lateral area of a cone with a radius of 7 ft. ...

Math for Ms. Sue please! Last math questions! - For numbers 1–3, find the ...

geometry - Find the surface area of a cone with a slant height of 11 and a ...