How many spherical lead shots each of diameter 4.2 cm can be obtained from a solid rectangular lead piece with dimensions 66 cm, 42 cm and 21 cm?


Volume of cuboid = lbh where, l = length, b = breadth and h = height


For cuboidal lead ;


Length, l = 66 cm


Breadth, b = 42 cm


Height, h = 21 cm


Volume of lead = 66(42)(21) = 58212 cm3



For spherical shots,


Diameter = 4.2 cm


Radius, r = 2.1 cm



Now,



So, 1500 bullets can be made from lead.


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