in a hollow cuboid box of size 4 × 3 × 2 metre the number of solid iron spherical balls of radius 0.5 m that can be packed
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vol. of cuboid=4 x 3 x 2= 24 m^3
vol. of one spherical ball=4/3 r^3
=4/3 x 3.14 x (0.5)^3
=4/3 x 3.14 x 0.125
=0.523 m^3
no. of balls can be packed = 24/0.523= 45.88(approx.)
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