Question

Andre made a wax model of a rolling pin of diameter 4 cm. The rolling pin was shaped like a right circular cylinder with a right circular cone at each end as shown below.

What was the total surface area of the rolling pin? Using complete sentences, describe the steps you used to calculate the surface area.

Answer 1

@jim_thompson5910 im not exactly sure how to do this so therefore i dont know how to explain it to write it in complete sentences.

Answer 2

you have to find the surface area of the cones on the end (but ignore the base)

then you need to find the lateral surface area of the cylinder, which you would add on

Answer 3

yeah i know that but how do i subtract the bases? @jim_thompson5910

Answer 4

you would find the area of the bases (which are just circles -- so you need to find the area of each circle), then subtract them off

Answer 5

ok thank you that helps a lot! :)

Answer 6

np