SOLUTION: The surface area of a right circular cylinder is given by SA=2πrh+2πrē, r=radius and h=height. What is the radius (rounded to the tenth) of a right circular cylinder of a

Algebra ->  Volume -> SOLUTION: The surface area of a right circular cylinder is given by SA=2πrh+2πrē, r=radius and h=height. What is the radius (rounded to the tenth) of a right circular cylinder of a      Log On


   

Question 1101487: The surface area of a right circular cylinder is given by SA=2πrh+2πrē, r=radius and h=height. What is the radius (rounded to the tenth) of a right circular cylinder of a height 5.5m and surface area of 90πmē.
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
That means you want to solve A=2pi%2Arh%2B2pi%2Ar%5E2 for the radius r. Once done, you substitute the given values and evaluate r. (You may need to solve a quadratic equation in the variable, r).