Question

Which formula would be used to determine the surface area of this pencil? (Hint: This is a composite figure of two shapes)

a pencil that comes to a point at the end is shown.

The quantity 2 times pi times radius squared plus 2 times pi times radius times height, end quantity, plus the quantity pi times radius squared plus pi times radius slant height, end quantity minus two times quantity pi times radius squared, end quantity

Answer 1

The quantity 2 times pi times radius squared plus 2 times pi times radius times height, end quantity, plus the quantity pi times radius squared plus pi times radius slant height

The quantity pi times radius squared plus 2 times pi times radius times height , end quantity, plus the quantity 2 times pi times slant height

The quantity 2 times pi times radius squared plus 2 times pi times radius times height, end quantity, minus the quantity pi times radius squared, end quantity, plus the quantity pi times radius squared plus 2 times pi times slant height, end quantity, minus the quantity pi times radius squared