2. First of all, it requires the trademark paper to be stuck around, so it is not stuck up and down. So find the surrounding area: (20x30+15x30) x2 = (600+300) x2 =180000 (square centimeter). If the interface is four centimeters, then the height is multiplied by four:: 30x4= 120 (square centimeter). Add them together:180000+120 =180120 (square centimeter).

Hehe, I'm glad to help you, because I'm in grade five, too.