The diameter of a sphearical cannonball is 42cm.it is melted and recast into a right circular mould,the base of which is 28cm in diametre.find the height of the cone
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volume of sphere = 4/3×22/7×21×21×21=38808
volume of cone = 38808
1/3×22/7×14×14×h=38808
h=38808×3×7/22×1/14×14
=189cm
volume of cone = 38808
1/3×22/7×14×14×h=38808
h=38808×3×7/22×1/14×14
=189cm
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