Question

Mary is wrapping a can of paint to gift it to a friend. If the can is 11 inches high and has a diameter of 7 inches then how many square inches of wrapping paper will be used? (take π = 3.14)

• A. 319 square inches
• B. 241 square inches
• C. 391 square inches
• D. 421 square inches

Answer 1

The correct option is A 319 square inches

Given,
diameter (d) = 7 inches
So, radius (r) = 3.5 inches
height (h) = 11 inches
The total surface area is given by $2\pi r^2+2\pi rh$
Hence, total surface area = 2 $\times$ 3.14 $\times$ 3.5 $\times$ 3.5 + 2 $\times$ 3.14 $\times$ 3.5 $\times$ 11
$\Rightarrow$ Surface Area = (77 + 242 ) square inches
= 319 square inches