Question

Find the area of the curved surface of a cylindrical box with radius 12 inches and height 20 inches.

• A. $1505.1{in}^2$
• B. $1506.5{in}^2$
• C. $1507.5{in}^2$
• D. $1507.2{in}^2$

Answer 1

Answer: (D)

$1507.2{in}^2$

Curved surface area of cylinder is $A=2\pi rh$

Here, the radius is $12$ in and height is $20$ in.

Thus,

$A=2\pi rh=2\times 3.14\times 12\times 20=1507.2$ in${}^2$

Hence, the curved surface area of the cylinder is $1507.2$ in${}^2$.