A roll of paper towels is 10 inches high and 2.5 inches in diameter. How many full squares inches of paper towel can fit on the roll in 15 rotation?

Question

* all I need is a formula of this question.
Do I use lateral surface area formula or total surface area formula

Answer 1

C = πd = 3.14 * 2.5 = ?

Area of towel = ? * 10 * 15

Of course, this will be a little off, since the circumference will increase as the layers accumulate.