a math question

Question

Find the volume of the figure when d = 8 cm.

 For calculations involving 𝜋, give both the exact value and an approximation to the nearest hundredth of a unit.

Answer 1

IF the figure is a sphere, then Surface Area = 4pi(r^2) = 4pi(4)^2

= 64 pi cm^2

= about 201.06 cm^2

sphere's Volume = (4/3)pi(r^3) = (4/3(pi)(8 = 32pi/3 cm^3

= about 33.51 cm^3

if the figure is a cone or cylynder you need more information, the height.

a cylinder's volume would be hpir^2 = hpi(4^2) = 16hpi cm^3

= about 16(3.14159)h = about 50.27h cm^3 where h= the cylinder's height

for a cone, volume would be 1/3 of the cylinder's volume

=16hpi/3 cm^3 where h= the cone's height

= about 16.76h cm^3