Determining the external diameter
A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thickness of the pipe is 1 cm and iron weighs 8 g/cm3, then the weight of the pipe is:
A. 3.6 kg
B. 3.696 kg
C. 36 kg
D. 36.9 kg
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Sam purchased 20 dozens of toys at the rate of Rs. 375 per dozen. He sold each one of them at the rate of Rs. 33. What was his percentage profit?
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As found from dynamic analysis of the actual forces in the engine.if the arms and hub contribute 5% of the flywheel effect (K=0.95),what is the necessary dimensions of a square rim section of cast iron which has density of 7000 kg/meter cube?
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