radius of a solid copper cylinder is 4.2cm and its height is 16cm.how many discs of diameter 1.4 cm and thickness 0.2cm can be made from this cylinder.
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288 such cylinders can be cut
Radius(r)=4.2 cm
Height(h)=16 cm
Volume= πr^2h=22/7*4.2*4.2*16 cm^3
=22*42*42*16/7*10*10cm^3
radius of the cylinders to be cut=1.4/2cm=0.7cm
height=0.2cm
Volume of the cylinders to be cut=π*0.7*0.7*0.2cm^3
=22*7*7*2/7*10*10*10 cm^3
No. of such cylinders that can be cut from the given cylinder=(22*42*42*16/7*10*10)/(22*7*7*2/7*10*10*10)=6*6*8=288
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