Question

A number of small metal disk of diameter 2cm and thickness 0.5cm one melted to form a cylinder with diameter 10cm and height 20cm .How many disc were required to create the cylinder

Answer 1

1000 metal Discs required to create Cylinder

Step-by-step explanation:

metal disk of diameter 2cm and thickness 0.5cm

Radius = 1 cm

thickness (height) = 0.5 cm

Volume of 1 metal Disk = π R² H

= π (1)² * 0.5

= 0.5 π cm³

formed a cylinder with diameter 10cm and height 20cm

Radius = 5 cm

height = 20 cm

Volume of cylinder =  π (5)² * 20

= 500 π

Number of Metal Discs required = 500π / 0.5π  

= 1000

1000 metal Discs required to create Cylinder

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