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ball bearings

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How many ball bearings can you make from a cone? 2009-03-14
Vatsal pose la question :
there is a sum in my maths book which states the following: how many ball bearings of diameter 2.5 cm. can you get by melting a solid metalic cone of radi. 20cm and a Hight of 5 meters? how do i do this please tell me even the minute things like cancellatoins and where to use = , ; or any such thing because Im a bit weak in maths
Harley Weston lui répond.
Ball bearings in an oil can 2007-12-03
Lisa pose la question :
One hundred ball bearings with radius 5 mm are dropped into a cylindrical can, which is half full of oil. The height of the cylinder is 20 cm and the radius is 8 cm. By how much does the level of the oil rise?
Stephen La Rocque lui répond.
 
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