spheres made of glass of radius 2cm are packed into a cuboid of dimensions 16cmx8cmx8cm.20 spheres are packed inside it and the remaining areas is filled with packing material to avoid breakage.what is the volume of packing material used?
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volume of packing material=volume of cuboid-20volume of sphere
=lxbxh-20 (4/3pi.r^3)
=16x8x8-20x4/3x(3.14)x8
=8x8{16-10x (3.14)/3}
=64x (16-10.5)
=64x5.5
=352cm^3
=lxbxh-20 (4/3pi.r^3)
=16x8x8-20x4/3x(3.14)x8
=8x8{16-10x (3.14)/3}
=64x (16-10.5)
=64x5.5
=352cm^3
abhi178:
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