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Graphite lead diameter of 1mm is inserted in a pencil with base diameter 7mm. If length of 14cm, find volume of wood and volune of graphite



  • JBM
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Volume of graphite =22/7*1/2*1/2*14
                               =11 cubic cm
volume of wood=22/7(7/2+1/2)(7/2-1/2)
                         =37.68 cubic cm
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