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Question

How many bullets can be made out of a cube of lead, whose edge measures 22 cm, each bullet being 2 cm in diameter?


Solution

Edge of the cube (r)=22cmVolume=a3=(22)3cm3=22×22×22=10648cm3
 Diameter of a bullet = 2 cm
Radius (r) =22=1cm
  Volume of 1 bullet =43πr3
 =43×227×1×1×1cm3=8821cm3
Number of bullets=Total volumeVolume of one bullet=10648×2188=2541


Mathematics
RD Sharma
Standard IX

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