find the surface area and volume of a sphere of radius 21cm

 

r of sphere=21cm
Surface Area of Sphere=4 pie r2
Surface area of Sphere = 4*21/7 * 21 * 21 cm2
Surface Area of sphere=5292 cm2
 
And Volume of Sphere
r=21cm
Volume of Sphere = (4/3) pie r3
Volume of Sphere = 4/3 * 21/7 * 21 * 21 * 21 cm3
Volume of Sphere =  37044 cm3
 
  • 2
radius of sphere = 21 cm
surface area of sphere = 4 pi r2
                                                = 4 * 22/7 * 21 *21

                                     = 38808/7
                                   = 5544 cm2

vol. of sphere = (4/3 )* pi * r3
                               = (4/3) * (22/7) * 21 * 21 * 21 
                         = 38808 cm3
 
  • 4
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