Question

find the number of coins , 1.5 cm in diameter and 0.2 cm thick, to be melted to form a right circular cylinder with a height of 10 cm and diameter of 4.5 cm.

Answer 1

diameter is 3.height is 9.8

Answer 2

Volume of the coin = pi×r^2*h
radius of the coin = 1.5/2 cm
height of the coin = 0.2cm
volume = 22/7 * 1.5/2 * 1.5/2 * 0.2

Volume of the right circular cylinder = pi×r^2×h
= 22/7* 4.5/2*4.5/2*10

No. of coins = Volume of the right circular cy
linder/Volume of the coin


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