geometry
posted by Piggy .
What is the height of a cylinder with a radius of 6 inches and a surface area of 168pi in^2?

Area = 2 pi R^2 + pi R H
Substitute 6 for R.
Area = 72 pi + 6 pi H
= 168 pi
Therefore
96 pi = 6 pi H
and
H = 16 (inches) 
the formula should be
s = 2piRH + 2piR^2
I follow your method and find the
H = 8. Thanks. 
You're right. Senior moment.
Area = 2 pi R^2 + 2 pi R H = 168 pi
72 pi + 12 pi H = 168 pi
12 pi H = 96 pi
H = 8
Good work!
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 need help
Claim: the lateral (side ) surface of any area of any cylinder can is larger than the circlar surface area of its bottom. Which of the following is an example showing that the claim is false? 
For Ms Sue
Claim: the lateral (side ) surface of any area of any cylinder can is larger than the circlar surface area of its bottom. Which of the following is an example showing that the claim is false? 
Math
the formula for the surface area of a cylinder is: A=2πrh+2πr^2 If the height of the cylinder is 10 inches, and the surface area is 200 sq. inches, determine the length of the radius 
Geometry
The surface area of the sides of a right cylinder can be found by multiplying twice the number pie by the radius times the height. If a circular cylinder has radius (r) and height (h), write an expression that represents the surface … 
math
surface area of a rightcircular cylinder. The area of a right circular cylinder is given by the polynomial 2pierh^2 where h is the height and r is the radius of the base. Suppose that a beverage can has a height of 6.2 inches and a … 
Geometry/Math
Two right circular cylinders have equal volume. The first cylinder has a radius of 6 inches and a height of 12 inches. What is the number of inches in the height of the second cylinder if its radius is 8 inches? 
Geo
What is the altitude of this cylinder: B ==> C? 
Mrs. Sue
What is the altitude of this cylinder: B ==> C? 
Geometry
Find the radius of a right cone with a slant height of 22 and surface area of 168pi