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

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

[A].

[B].

[C].

168

[D].

336

Answer: Option A

Explanation:

Let the length of the wire be h.

Radius =	1	mm	=	1	cm.	Then,
	2			20

	22	x	1	x	1	x h = 66.
	7		20		20

h =		66 x 20 x 20 x 7		= 8400 cm = 84 m.
		22