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If 1 cm^3' of cast iron weighs 21 g, fin...

If `1 cm^3`' of cast iron weighs 21 g, find the weight of a cast iron pipe of length 1 m with a bore of 3 cm in which the thickness of the metal is 1 cm.

A

21 kg

B

24.2 kg

C

26.4 kg

D

18.6 kg

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The correct Answer is:
C
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