81) The C.G. of a plane lamina will not be at its geometrical centre in the case of a

82) The C.G. of a right circular solid cone of height h lies at the following distance from the base

83) The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is

84) Which of the following is the example of lever of first order

85) A pair of smith′s tongs is an example of the lever of