Question

a paper coffee filter has a radius of 6 centimeters and a slant of height of 12 centimeters. find the surface area of the filter. round your answer to the nearest whole number.

Answer 1

Using the formula πrl +πr²

`\pi = 3.142`

`l = 12cm`
surface area of the filter which is in form of a right cone is πrl+πr²


`(3.142 * 6 * 12) + (3.142 * {6}^(2))`
=339.336
=339cm² to nearest cm