Post a New Question

Geometry

posted by .

A wooden cylinder with a diameter of 10 centimeters and a height of 20 centimeters rests on its circular base. It is cut in half horizontally. What is the difference between the combined surface areas of the two newly created cylinders and the total surface area of the original cylinder?
These are my choices:
a. 100rr sq cm
b. 50rr sq cm
c. 25rr sq cm
d. 0 sq cm

I came up with 100rr sq cm??

  • Geometry -

    JESUS

  • Geometry -

    big cylinder = 2π(5^2) + 2π(5)(20) = 300π

    smaller = 2π(5^2) + 2π(5)(10) = 200π
    but we have two of those, so the new surface area is 400π

    difference is 100π

    you are correct is the "rr" is supposed to be π

  • Geometry -

    A cylinder has a height of 16 cm and a radius of 5 cm. A cone has a height of 12 cm and a radius of 4 cm. If the cone is placed inside the cylinder as shown, what is the volume of the air space surrounding the cone inside the cylinder? (Use 3.14 as an approximation of .)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    A right cylinder has a total surface area of 471 square centimeters. The radius of the cylinder is 5 centimeters. What is the height in centimeters of the cylinder?
  2. geometry

    a rectangular prism has a volume of 132 cubic centimeters . the length of the base is 4 centimeters and the widtyh of the base is 3 centimeters, what is the height of the prism?
  3. Algebra 1

    A right triangle has a base measuring 5 centimeters & a height of 12 centimeters. By what amount will the area of this triangle increase if both the base length & the height are tripled?
  4. geometry

    the radius of the base of the metallic rod is 2o centimeters and height 15 centimeters what is the volume of a cylinder
  5. geometry

    the radius of the base of the metallic rod is 2o centimeters and height 15 centimeters what is the volume of a cylinder
  6. calculus

    A potter forms a piece of clay into a right circular cylinder. As she rolls it, the height h of the cylinder increases and the radius r decreases. Assume that no clay is lost in the process. Suppose the height of the cylinder is increasing …
  7. GEOMETRY

    The picture below shows a container that Rene uses to freeze water. A cylinder is shown with base diameter of 6 centimeters and the height as 8 centimeters. What is the minimum number of identical containers that Rene would need to …
  8. Geometry

    Karen makes pottery on a pottery wheel. Today she is making vases that are in the shape of a circular cylinder that is open at the top, that is, it has only one base. The base has a radius of 4.5 centimeters and 0.75 centimeters thick. …
  9. Calculus

    A water tank in the shape of a right circular cylinder has a volume that is increasing at the rate of 300pi cubic centimeters per hour. If the height is decreasing at the rate of 15 centimeters per hour, find the rate at which the …
  10. Calculus

    A potter forms a piece of clay into a right circular cylinder. As she rolls it, the height h of the cylinder increases and the radius r decreases. Assume that no clay is lost in the process. Suppose the height of the cylinder is increasing …

More Similar Questions

Post a New Question