surface area and volume formulas

Example 1:Find the surface of the sphere, whose radius is 6 cm.Solution:Formula for finding the surface area of sphere is given as,Surface area of sphere     = 4 âˆ r2                                     = 4*3.14*62                                     = 12.56*36                                     = 452.16 cm2.Example 2:Find the area of sphere ball whose diameter is 8 cm.Solution: Formula for finding the surface area of sphere is given as,Surface area of sphere = 4 âˆ r2Radius  = Diameter/2            = 8/2            = 4 cmArea     = 4*3.14*42            = 12.56*16            = 200.96 cm2. Example 3:Find the volume of the sphere, whose radius is 3 cm.Solution:Formula for finding the volume of sphere is given as,Volume of sphere = (4∏r3)/3                             = 4*3.14*33 / 3                             = 12.56*27 / 3                             = 12.56*9                             = 113.04 cm3.