Question

Jill needs wrapping paper for a cylindrical gift that is 10 inches high and measures 4 inches across the base. how much wrapping paper will she need

formula: SA = 2πR² + ²πRH (USE 3.14 FOR π)

Answer 1

150.72 in²

Explanation:

The radius of the cylinder is half its diameter, so is 2 inches. We can rearrange the formula to make it easier to use, then fill in the numbers and do the arithmetic.

SA = 2πR(R +H) = 2(3.14)(2)(2+10) = 150.72 . . . . square inches

Jill will need 150.72 square inches of wrapping paper.