66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be:
Select the correct option
A) 66  B) 84  C) 80  D) 72  E) 68
Let the length of the wire be h.   Radius =1/2mm=1/20cm.	Then,   (22/7)x (1/20) x (1/20) x h = 66.   h = (66 x 20 x 20 x 7)/22 = 8400 cm = 84 m.   ANSWER 84
<result>B</result>
66 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be: