How many silver coins, 1.75 cm in diameter and of thickness 2 mm, must be melted to form a cuboid of dimensions 5.5 cm × 10 cm × 3.5 cm?
Solution: Radius of coin = 0.875 cm, height = 0.2 cm
Dimensions of cuboid = 5.5 cm x 10 cm x 3.5 cm
Volume of coin
Volume of cuboid = 5.5 x 10 x 3.5 = 192.5 cm3
Number of coins
