Math, asked by ay1110079, 5 months ago

a solid niddle of steel is in the shape of right circular cone mounted on a cylinder of radius 0.25cm. the height of the conical part is 3cm and the total height of the niddle is 14cm. find its mass, if the density of steel is 7 gram /cm cube

Answers

Answered by LuciferWarrior

4

Answer:

16.5 grams.

vol.(needle)=vol.(cone+cylinder)

=⅓pir²h+pir²h'

=pir²(⅓h+h')

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