The length of metal pipe is 70cm, diameter of inside is 10cm and thickness of metal is 5mm. If density of metal is 8gm/cm^3 than find mass of metal
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mass=density × volume
=>volume of the cylindrical pipe= volume of a hollow cylinder
=>volume of a hollow cylinder = 3.14× height(length)×(R^2-r^2)
=>volume =3.14×70×((10.5)^2 -(10)^2)
=>volume =2252.95 cm^3
•°• mass = 8 × 2252.95 = 18023.6 gm
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