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Relation between slant height and height of a right circular cone

Centre of mas...

Question

Centre of mass of a semicircular plate of radius R, the density of which linearly varies with distance, d at the centre to a value 2d at the circumference is:

A

\frac{3 r}{π}

from the centre

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B

\frac{4 r}{2 π}

from the centre

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C

\frac{5 r}{π}

from the centre

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D

\frac{7 r}{5 π}

from the centre

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Solution

The correct option is C $\frac{5 r}{π}$ from the centre

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Relation between slant height and height of a right circular cone

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