How many shots each having diameter Medium 3 cm can be made from a cuboidal lead solid of dimensions


Volume of cuboid = lbh


where, l = length, b = breadth and h = height


For cuboidal lead:


Length, l = 9 cm


Breadth, b = 11 cm


Height, h = 12 cm


Volume of lead = 9(11)(12) = 1188 cm3


Volume of sphere


where r = radius of sphere


For spherical shots,


Diameter = 3 cm


Radius, r = 1.5 cm


[As radius = diameter/2]


Volume of one shot


Now,



So, 84 bullets can be made from lead.


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