The thickness of a metal pipe is 1.5cm. The inner diameter is 21cm. What is the volume of metal required for a pipe of length 7cm
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Heya ☺
Given that
Thickness = 1.5cm
Inner Diameter = 21cm
Height = 7cm
Solution
Inner Radius = 21/2cm
= 10.5
Outer Radius = Inner Radius + Thickness
= (10.5 + 1.5) cm
= 12 cm
Volume of the metal = πR^2h - πr^2h
= πh (R^2 - r^2)
= 22/7 × 7 (12^2 - 10.5^2)
= 22 × (144 - 110.25)
= 22 × 33.75
= 742.50cm^3
Thanks
Given that
Thickness = 1.5cm
Inner Diameter = 21cm
Height = 7cm
Solution
Inner Radius = 21/2cm
= 10.5
Outer Radius = Inner Radius + Thickness
= (10.5 + 1.5) cm
= 12 cm
Volume of the metal = πR^2h - πr^2h
= πh (R^2 - r^2)
= 22/7 × 7 (12^2 - 10.5^2)
= 22 × (144 - 110.25)
= 22 × 33.75
= 742.50cm^3
Thanks
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