###### Asked in Geometry

Geometry

# What is the surface are if a sphere with radius of 3?

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###### Asked in Math and Arithmetic, Algebra, Geometry

### What is the surface area of a cylinder with end that are half sphere with a radius of 4 and height of 12?

If the radius of the hemispheres is 4, then that leave 4 units
for the length if the straight part of the cylinder.
Total surface area = surface area of 1/2 sphere of radius 4 +
lateral surface area of cylinder of radius 4 and height 4 + surface
area of 1/2 sphere of radius 4.
= surface area of sphere of radius 4 + lateral surface area of
cylinder of radius 4
= 4*3*pi*43 + pi*42*4 = 469.1 cubic units.

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