Friday

August 22, 2014

August 22, 2014

Posted by **Math's Noob** on Wednesday, January 11, 2012 at 12:53am.

- Maths -
**Reiny**, Wednesday, January 11, 2012 at 8:58amouter radius = 1.5 cm

volume (if solid metal) = (4/3)π r^3

= (4/3) π (1.5)^3

= 4.5π

Hollow part = (4/3)π(1^3 = 4π/3

so volume of metal = (9/2)π - (4/3)π

= (19/6)π

or appr. 9.95 , (nobody uses 22/7 for π, we all have calculators)

**Related Questions**

physics - A cylindrical tube open at both ends is made of metal. The internal ...

physics - A cylindrical tube open at both ends is made of metal. The internal ...

math - Metal discs for pet collars have a diameter of 4cm. Each disc is 0.1cm ...

Maths - A rectangualr metal sheet is 32m long, 16m wide and 12mm thick. Eight ...

PHYSICS - A capacitor consists of a solid metal sphere of radius 3 cm placed at ...

Maths - Hi im doing measurement at skool at the moment and i cant quite ork out ...

Math - A set of 12 identical metal ballbearings was made from 10 cm^3 of metal. ...

Science - Jake was doing a lab to find the density of metal. Here's his data: ...

Chemistry - a cube of metal has a mass of 1.45 kg. when the metal is placed into...

calculus - A cylindrical metal can with an open top is to be constructed. the ...