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.
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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
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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
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