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Question

16 glass spheres each of radius 2 cm are packed into a cuboidal box of internal dimensions 16 cm × 8 cm × 8 cm and then the box is filled with water . Find the volume of the water filled in the box .

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Solution

Radius of the glass spheres, r = 2 cm
Dimensions of the cuboidal box = 16cm×8cm×8cm
volume of the spheres = Vs=43πr3=43π23
volume of the cuboidal box = Vc=16×8×8=1024
Volume of water in the cuboidal box = Volume of the cuboidal box − Volume of the 16 glass spheres
=1024-16×43π23=1024-536.6=487.6 cm3
Hence, the volume of the water in the cuboidal box = 487.6 cm3

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