Find the length of 11 kg copper wire of diameter 0.4 cm. Given one cubic cm of copper weighs 8.4 gram.

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132 m

116 m

111.59 m

104.17 m

answer is D.

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Detailed Solution

Concept- We have determined the copper wire's length in this. By visualizing the copper wire as a cylinder, we can determine its length. The length of the cylinder will then be determined by its volume.
Below is a diagram of copper wire (in a cylindrical shape) with diameter:
Question Image

Considering that copper wire has a 0.4 cm diameter. Copper wire has a 0.2 cm radius. Considering that a cubic centimeter of wire weighs 8.4 grams
11 kg of copper wire volume=

The wire is also cylindrical in shape. Copper wire volume is equal to

. Where copper wire's radius and length are denoted by r and h.
Question Image

Hence, the correct answer is option 4.

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