A solid cylinder of radius 7cm and height14cm is melted and recast into solid spheres of radius 3.5 cm. Find the numbers of spheres formed
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volume of the cylinder is π7^2.14cucm
volume of the sphere is 4/3π3.5^3cucm
number of spheres
volume of the cylinder/volume of the sphere
π7^2.14/4/3π.3.5^3
=49.14.3/4×3.5×3.5×3.5
=12
so the number of spheres formed is 12
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