How much paper will she need?

Question

Nguyen is decorating the room for her sister’s baby shower party. She is wrapping Vietnamese conical hats in baby prints tissue paper to decorate the tables and some shelves in the wall. Each hat has a diameter of 16 inches and a height of 9 inches. If she wants to wrap 21 Vietnamese hats, how much tissue paper will she need?

A 4,176 in2

B 8,975 in2

C 10,580 in2

D 36,267 in2

Answer 1

A_L = 8π √(9² + 8²)

A_L = 8π√145

Now multiply by 16 to get the amount of paper needed.

Answer 2

pi * r * (r + sqrt( h^2 + r^2) )

pi * 8 * (8 + sqrt( 81 + 64) )

pi * 8 * (8 + sqrt(145))

which is approximately 503.7

....

multiplies by 21

10577.7044...

the closest option is C