Question

A water cup is shaped like a cone. It has a diameter of 3 inches and a slant height of 5 inches. About how many square inches of paper do you need to make a cup? Use 3.14 to approximate pi.
24 square inches


31 square inches


47 square inches


52 square inches

Answer 1

Formula for area of cone not covered.
$\pi \times radius \times slant$
Radius is half of diameter. Therefore 1.5in
Using formula
3.14x1.5x5=23.55
Round up to 24in². answer is A