Posted by **kolapo** on Saturday, August 7, 2010 at 7:18am.

a solid alumimium casting for a pulley consists of the discs each 1 1/2 cm thick of diameters 4 cm, 6 cm,and 8 cm.a central hole 2 cm in diameter is drilled out .if the density of the alumimium is 2.8g/cm^3,calculate the mass of the casting

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