Practice | Hashtable

1. 66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be:

A. 84 meters

B. 90 meters

C. 168 meters

D. 336 meters

Solution:

\begin{aligned} Let the length of the wire be h \\ Radius = \frac{1}{2} m m = \frac{1}{20} c m . Then, \\ \Rightarrow \frac{22}{7} \times \frac{1}{20} \times \frac{1}{20} \times h = 66 \\ \Rightarrow h = \frac{66 \times 20 \times 20 \times 7}{22} \\ = 8400 c m \\ = 84 m e t e r s \end{aligned}

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