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Polygons(n>3)

Q18 A hollow ...

Question

Q18) 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

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(b) 3.696 kg

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(d) 36.9 kg

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Solution

The correct option is B (b) 3.696 kg
Ans: 18) (B)

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Q18) 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:

The correct option is B (b) 3.696 kgAns: 18) (B)

Q18) 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:

The correct option is B (b) 3.696 kg
Ans: 18) (B)