20. For a project, Johnny is making a cylinderflower pot for his frien

1.	20. For a project, Johnny is making a cylinderflower pot for his friend Suzie. The pot has abottom, but no top. If Johnny's pot has aheight of 22cm and a diameter of 18cm, howmany square centimeters of material does heneed to make the pot?
Answer» Given,Height h = 22 cm, Radius r = 18/2 = 9 cm Then,Surface area of cylinder= 2pirh + pirr= 222/7922 + 22/799= 22/79(44 + 9)= 22/79*53= 1499.14 cm^2 Therefore 1499.14 cm^2 material he needed to make pot

20. For a project, Johnny is making a cylinderflower pot for his friend Suzie. The pot has abottom, but no top. If Johnny's pot has aheight of 22cm and a diameter of 18cm, howmany square centimeters of material does heneed to make the pot?

Answer»

Given,Height h = 22 cm, Radius r = 18/2 = 9 cm

Then,Surface area of cylinder= 2*pi*r*h + pi*r*r= 2*22/7*9*22 + 22/7*9*9= 22/7*9(44 + 9)= 22/7*9*53= 1499.14 cm^2

Therefore 1499.14 cm^2 material he needed to make pot