a section of concrete pipe 30 m long has an inner diameter of 1.2 m and outer diameter is 1.8 m . what is the volume of concrete in this section of pipe
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Given that
Height = 30m
Inner Diameter = 1.2m
Outer Diameter = 1.8m
Solution
Inner Radius = 1.2/2m
= 0.6m
Outer Radius = 1.8/2m
= 0.9m
Volume of section of concrete pipe = πR^2h - πr^2h
= πh = (R^2 - r^2)
= 22/7 × 30 (0.9^2 - 0.6^2)
= 660/7 × (0.81 - 0.36)
= 660/7 × 0.45
= 42.42m^3
Thanks
Height = 30m
Inner Diameter = 1.2m
Outer Diameter = 1.8m
Solution
Inner Radius = 1.2/2m
= 0.6m
Outer Radius = 1.8/2m
= 0.9m
Volume of section of concrete pipe = πR^2h - πr^2h
= πh = (R^2 - r^2)
= 22/7 × 30 (0.9^2 - 0.6^2)
= 660/7 × (0.81 - 0.36)
= 660/7 × 0.45
= 42.42m^3
Thanks
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