find the number of coins 1.5 CM in diameter and 0.2 CM thick to be melted to form a right circular cylinder of height 16 cm and diameter 6 CM
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Answer:
5120
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Answer:
r=radius
h=height(thickness)
r=1.5/2 cm
h=0.2 cm
volume of each coin=πr²h=π x 1.5/2 x 1.5/2 x 0.2=0.225πcm³
r=radius of cylinder =6/2=3cm
h=height of cylinder=16cm
volume of cylinder=πr²h=π x 3 x 3 x 16=144π
number of coins =volume of cylinder/volume of one coin
144π/0.225 π = 640 coins
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