SOLUTION: A cylinder is inscribed in a sphere of radius 1. Express the volume V of the cylinder as a function of the base radius r. (The final answer must not contain any variable other than

Algebra ->  Volume -> SOLUTION: A cylinder is inscribed in a sphere of radius 1. Express the volume V of the cylinder as a function of the base radius r. (The final answer must not contain any variable other than      Log On


   



Question 1011932: A cylinder is inscribed in a sphere of radius 1. Express the volume V of the cylinder as a function of the base radius r. (The final answer must not contain any variable other than r. Please show all steps including algebra clearly)
Found 2 solutions by dkppathak, ikleyn:
Answer by dkppathak(439) About Me  (Show Source):
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A cylinder is inscribed in a sphere of radius 1. Express the volume V of the cylinder as a function of the base radius r. (The final answer must not contain any variable other than r. Please show all steps including algebra clearly)
let base radius of cylinder is r
radius of sphere is 1 given
height of cylinder will be 2 unit
volume of cylinder = pie r^2h= pie r^2x2 =2pie r^2
can be solved further use pie=3.14 or 22/7
2x22xr^2/7=44r^2/7
or
2x3.14r^2=6.28r^2

Answer by ikleyn(52803) About Me  (Show Source):
You can put this solution on YOUR website!
.
A cylinder is inscribed in a sphere of radius 1. Express the volume V of the cylinder as a function of the base radius r.
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Volume of a cylinder is 

V = pi%2Ar%5E2%2Ah,        (1)

where r is the radius of the cylinder and h is the height of the cylinder.

When cylinder of the radius r is inscribed in a sphere of radius r,

h = 2%2Asqrt%281-r%5E2%29       (2)

(make a sketch and apply the Pythagorean theorem).

Substitute (2) into (1), and you will get

V = 2%2Api%2Ar%5E2%2Asqrt%281-r%5E2%29.

This is the required formula.