Question
How many bullets can be made out of a lead cylinder 32cm
high and 12 cm radius, each bullet being 4 cm in diameter?Solution
Volume of cylinder = π x r2  x h = π x 122  x 32 = 14482.3 cm3   & Volume of each bullet = (4/3) x π x 23  = 704/21 cm 3  So number of bullets = Volume of cylider/volume of 1 bullet = 14482.3/(704/21) = 432
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