Question

Find the number of coins 1.5cm in diameter and 0.2cm thick, which should be melted to form a right circular cylinder of height 10cm and diameter 4.5cm​

Answer 1

Answer:

Step-by-step explanation:

       As the coins are in the form of thin cylinder

Volume of each coin = π×(0.75)²×0.2 =0.1125π cm³

Volume of melted cylinder = π× (2.25)²× 10 = 50.625π cm³

number of coin required = (volume of melted cylinder)/(volume of each coin)

                                = 50.625π/0.1125π = 450 coins

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