Find the no. Of coins 1.5cm in diameter and 0.2 cm thick to be melted to form a right circular cylinder of height 15cm
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Radius of coin=1.5/2=0.75 cm
Volume=pi*0.75*0.75*0.2
=0.1125cm^3*pi
Now the cylinder is 15cm
Volume =pi*r*r*h
=0.75*0.75*15
=8.4375
No of coins=8.4375/0.1125=75
75 coins can be formed
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