Math 3/4
HW 3-18-11
Surface Area
1. A farmer stores grain in the silo shown below. The shape of the silo is a
cylinder with a radius of 6 feet and a height of 19 feet. On top of the cylinder is a
hemisphere (half of a sphere) that also has a radius of 6 feet. How much paint will
the farmer need to completely cover the outside of the silo (excluding the base)?
2.The rectangular prism below has a length measuring 7 units, a width
measuring 9 units, and a height of 8 units. What is the surface area, in
square units, of the prism?
3. Students in Mr. Chen's art class are designing their own labels for a soup can.
The label will completely cover the sides of the can with dimensions shown below.
How much paper, in square centimeters, will each student need to create the label?
Round your answer to the nearest tenth, if necessary.
4. A right circular cylinder has a radius measuring
8 units and a height of 6 units. What is the surface area,
in square units, of the cylinder? Round your answer to
the nearest tenth, if necessary.
5. Students in Mrs. Ortega's physics class are building a rocket for a national
competition. The main fuselage of the rocket is a cylinder with a diameter of 4.8 inches
and a height of 14.9 inches. The nosecone of the rocket is a cone with a diameter
of 4.8 inches, a height of 5.6 inches, and a slant height of approximately 6.1 inches
as shown below. What is the surface area, in square inches, of the rocket including
the base of the fuselage?
6. The sphere below has a radius of 6 units. What is the surface area of the sphere in square units? Round
your answer to the nearest tenth, if necessary.