55 cubic centimetres of silver is drawn into a wire 1 mm in diameter. The length of the wire in metres will be :
Choose one.
A) 84 m
B) 88 m
C) 120 m
D) 70 m
E) none

Rationale: "sol . let the length of the wire b h . radius = 1 / 2 mm = 1 / 20 cm . then , 22 / 7 * 1 / 20 * 1 / 20 * h = 55 ⇔ = [ 55 * 20 * 20 * 7 / 22 ] = 7000 cm = 70 m . answer d"
Answer: D