Mathematics

The curved surface area of a cylindrical tin is 704cm(^2). Calculate the height when the…

The curved surface area of a cylindrical tin is 704cm(^2). Calculate the height when the radius is 8cm. [Take π = 22/7]

  • A.
    3.5cm
  • B.
    7cm
  • C.
    14cm
  • D.
    28cm
  • E.
    32cm
Correct Answer: Option C
Explanation

Curved surface area of a cylindrical tin = (2pi rh)

(therefore 2pi rh = 704cm^2)

(2 times frac{22}{7} times 8 times h = 704)

(h = frac{704 times 7}{2 times 22 times 8})

(h = 14cm)