how many sliver coins of diameter 4 cm and thickness 3.5 cm have to be melted to prepare of a cuboid of 20cm ×11cm ×5 cm dimensions
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radius 2
height 3.5
volume of cylinder 44
let the no of coins be x
volume of cuboid 1100
according to question
44x=1100
x= 25
therefore no of coins = 25
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