Question
The outer diameter of a hollow cylindrical brass rod is
9.1 cm. The rod is 35mm thick and is 40cm long. If the weight of 1 cubic centimeter of brass rod is 0.5 Kg, then find the total weight of the rod.Solution
The outer radius of cylinder = 9.1/2 = 4.55 cm The inner radius of cylinder = 4.55-3.5cm = 1.05 cm 
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