find the number of coins,1.5cm in diameter and 0.2 cm thick,to be melted to form a right circular cylinder with a height of 10 cm and a diameter of 4.5cm.
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volume of a coin=πr *r h
=22÷7*1.5÷2*1.5/2*0.2
=99÷56
volume of cylinder=πr*r*h
22/7*4.5/2*4.5/2*10= 4455÷28
no of coin=99÷56*4455÷28
=45
=22÷7*1.5÷2*1.5/2*0.2
=99÷56
volume of cylinder=πr*r*h
22/7*4.5/2*4.5/2*10= 4455÷28
no of coin=99÷56*4455÷28
=45
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