Math, asked by tripauayuttsu, 1 year ago

Find the number of metallic circular disk with 1.5cm base diameter and height 0.2cm can be melted to form right circular cylinder of height 10cm and diameter 4.5cm

Answers

Answered by Reub3n
5
Each one of those coins is also a cylinder (just a very very short one), and its volume is
V = πr²h = π(.75)²(.2) = 9π/80 cm³
The right circular cylinder has volume V = π(2.25)²(10) = 405π/8 cm³.

Divide the larger cylinder's volume by the volume of each coin = (405π/8) / (9π/80) = 450 coins
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