Question

66 cm³ of silver is drawn into a wire 1 mm in diameter. The length of the wire will be 

A. 78 m 

B. 84 m 

C. 96 m 

D. 108 m

Answer 1

We have to find out length of the wire:

Length = \(\frac{Volume}{\pi r^2}\)

Diameter = 1mm (Given) 

Therefore, 

Radius = 0.05 cm

Length = \(\frac{66\times7}{22\times0.05\times0.05}\)

= 8400 cm 

= 84 m 

Hence, option B is correct