A body consist of a right ciralor solid cone ok luig ht 40 mm ond do dius 30mm placed on a solid heisplenz rodius 30 mem of the same matinial, find the po siHon of centre of grooviy the body.

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British Gravitational Bg System Of Units

Measuring is the comparison of a particular physical quantity with its reference value. A unit is a fixed physical quantity. The length is a physical quantity. A physical quantity is the product of a unit and the numerical value we need to compare with.