A hollow iron pipe is 21 cm long and its external diameter is 8 cm. If the thick

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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 weights 8 g/cm3, then the weight of the pipe is:

Options:

A . 3.6 kg

B . 3.696 kg

C . 36 kg

D . 36.9 kg

Answer: Option B

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