21 glass spheres each of radius 2cm are packed in cuboid box of internal dumension 16×8×8 and then box is filled with water find water filled in box
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volume of a sphere = 4/3×22/7×r³
volume of 21 sphere = 4/3×22/7×2×2×2×21
=4/3×22×2×2×2×3
= 4×22×2×2×2
= 4×176
= 704 cm³
volume of the cuboidal box = l×b×h
= 16×8×8
=1024 cm³
volume of water filled in the box = volume of cuboidal box -
volume of sphere glass
=1024 - 704
=320 cm³
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