Question

a right circular cylinder just encloses a sphere of radius 20cm. find ratio of the sphere's surface area to cylinder's CSA. (full steps please)

Answer 1

Answer:

1:1

Step-by-step explanation:

radius of sphere = 20 = radius of cylinder

diameter of sphere = 40 = height of cylinder

CSA of sphere = 4πr² = 1600πcm²

CSA of cylinder = 2πrh = 1600πcm²

ratio b/w CSA of sphere and cylinder = 1600π/1600π

=>1:1