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The area (in square units) of the circle which touches the lines $4x+3y=15$ and $4x+3y=5$ is :

$\begin {array} {1 1} (1)\;4 \pi & \quad (2)\;3 \pi \\ (3)\;2 \pi & \quad (4)\;\pi \end {array}$
Can you answer this question?

(4) $\pi$
answered Nov 7, 2013 by