A cube of edge 2cm is inscribed in a cylinder with an altitude of 4 cm. Find the volume of the cylinder?

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- March 22nd 2010, 09:51 PMreiwardCube
A cube of edge 2cm is inscribed in a cylinder with an altitude of 4 cm. Find the volume of the cylinder?

- March 23rd 2010, 03:42 AMGrandad
Hello reiwardDraw a

*plan*view of the cube inscribed in the cylinder, and you'll get a square of side cm inscribed in a circle. If the radius of the circle (and therefore also the cylinder) is , then:

Grandad - March 23rd 2010, 08:59 AMreiward
Can i use the formula

R = e / ( 2 sin theta/2 )

R = 2 / 2 sin 45

R = square rt of 2? - March 23rd 2010, 09:25 AMGrandad