Question

Find the number of coin, each of which are 1.5cm in diameter and 0.2cm thick, required to form a right circular cylinder of height 10cm and diameter 4.5cm.​

Answer 1

Step-by-step explanation:

Find the number of coins of 1.5 cm diameter and 0.2 cm ... to form a right circular cylinder of height 10 cm and diameter 4.5 cm. ... Volume of each coin = π×(0.75)²×0.2 =0.1125π cm³

Answer 2

Answer:

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