The pipe is in the shape of a hollow cylinder with circular ring as its base. If external radius...

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The pipe is in the shape of a hollow cylinder with circular ring as its base. If external radius of the pipe is \( 4 \mathrm{~cm} \) and its internal radius is \( 3 \mathrm{~cm} \) and length is \( 7 \mathrm{~m} \), then find the mass of the metal. (mass of \( 1 \mathrm{~cm}^{3} \) of metal is \( 11.49 \mathrm{gm} \).)
- a. \( 176.95 \mathrm{~kg} \)
b. \( 174.8 \mathrm{~kg} \)
-c. \( 175.36 \mathrm{~kg} \)
d. none of these
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