Question 1 internal radii of hollow metal cylinder = 5 cm external radii of hollow metal cylinder= 6 cm Length= 2.4 meter Density= 7.6 g/cm^3 Mass of Cylinder ?
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area or mass of a cylinder is pi x radius^2 density= mass x volume But how to use the two radii. shoule radius used be 6cm+5cm=11cm ?
To find the area of the cross section, subtract the area of the smaller circle from that of the larger circle.
Volume of a cylinder - Math Open Reference
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