sphere

• the vol of a sphere is 4/3 pi times the cube of the radius.

  use pi = 3.14 and r - radius
• vol - 4/3 x pi x r3 or 4 pi r3 divided by 3
• solve, given , r - 7m

  =4 x 3.14 x 7 x 7 x 7 divided by 3

  multiply the radius, then by 4 then by pi and then divide by 3

  = 4,308. 08 m3 divided by 3

  vol - 1, 436.03 m 3
• Radius: a straight line from the centre to the circumference of a circle or sphere.
• diameter: a straight line passing from side to side through the centre of a body or figure, especially a circle or sphere.