Question

Find the number of coins 1.5cm in diameter and 0.2 cm thick to be melted to form a right circular cylinder of height 16cm and diameter 6cm.

Answer 1

Answer:

Let n be the number of 1.5 cm diameter coins required to form a right circular cylinder of height 10 cm and diameter 4.5 cm.

Now,

Volume of right circular cylinder =n× volume of 1.5 cm diameter coin.

Therefore,

 n=π(21.5)2×102π(24.5)2×10

=20×2045×45×15×15×210×20×20×10

=9×10×5

=450

Step-by-step explanation:

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Answer 2

Answer:

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