A right circular cylinder of height 45 cm and radius 4 cm is made bymelting of spheres of radius 6 cm each. Find the number of spheres.
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Answer: Volume of cricle= πr*r*h
=π 4*4*45
=π720
volume of sphere= 4/3πr*r
=4/3π6*6
=π48
no. of sphere=volume of circle/volume of sphere
= π720/π48
=15 sphere
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