As shown in the figure, it is a hat, and the top of the hat is cylindrical and made of red parts; The brim is round and made of gold cloth. If the top of the hat

S 1=(20/2)^2π+20π*20

= 100π+400π

=500π

500π-400π= 100π

Red cloth is used more, 100π square centimeter.

π is pi.

Remember to give me a good comment if it helps you, huh?

If you have any new questions, please remember to ask them on the new page. I wish you progress in your study!