Geometry
posted by Sholanda .
A cylindrical container of paint with a radius of 6 inches is 15 inches tall. If all of the surface area except the top are made of metal, how much metal is used to make the container? Assume the thickness of the material is negligable. Round to the nearest square inch.

If the top of the paint container is made of plastic, how much plastic is used to make the top? Assume the thickness of the plastic is negligable. Round to the nearest square inch.

First question:
the surface area would be the bottom circle + the rectangular sleeve
= π(6^2) + 2π(6)(15)
= 36π + 180π
= 216π square inches
Second question:
Unless I am missing something, but isn't that just the area of the circle which was 36π
Respond to this Question
Similar Questions

math
a rectangular container with dimensions 10 inches by 15 inches by 20 inches is to be filled with water, using a cylindrical cup whose radius is 2 inches and whose height is 5 inches, what is the maximum number of full cups of water … 
Geometry
A cone and cylinder both have a radius of 3 inches and a height of 6 inches. If the coneshaped container is filled with water and this water is then poured into the empty cylindrical container, what will be the depth, in inches, of … 
calculus
A cylindrical metal can with an open top is to be constructed. the can must have a capacity of 24pie cubic inches. the metal used to contruct the bottom of the can costs 3 times as much as the metal in the rest of the can. Find the … 
Geometry
A science lab needs a right circular cylindrical container that holds 15 gallons of liquid & is 24in tall. A reference manual states that 231 cubic inches is equivalent to one gallon. What is the approximate radius, in inches, or the … 
algebra
Adam has a cylindrical container. He is going to pour water into the container from a cube that has a side length of 1.5 inches. The container has a diameter of 8 inches and is 2 feet tall. How many full cubes of water can Adam fit … 
math
A peanut manufacturing company pays $0.02 per square inch of label used on its cylindrical peanut containers. Each container has a radius of 1.5 inches and a height of 2.5 inches. If the label covers the lateral area of the container, … 
Geometry
You are designing a new container for powdered laundry detergent. You are considering a cylindrical container with a diameter of 14 inches and a height of 18 inches. Find the volume of this container to the nearest cubic unit. Use … 
Geo
What is the altitude of this cylinder: B ==> C? 
Calculus applications
A steel factory wishes to make a cylindrical container, of thin metal, to hold 100cm³, using the least possible area of metal. If the outside surface is S cm² and the radius is r cm, show that S = 2πr² + 200r1 and hence find the … 
ALGEBRA 2 HONORS
A container is to be made in the shape of a cylinder with a conical top. The lateral surface areas of the cylinder and cone are S1 = 2(pi)rh and S2 = 2(pi)r√(r^2 + h^2). The surface area of the base of the container is B= (pi)r^2. …