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

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
[B].	90
[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

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