A planet revolves about the sun in elliptical orbit. The arial velo...

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A planet revolves about the sun in elliptical orbit. The arial velocity \( \left(\frac{\mathrm{dA}}{\mathrm{dt}}\right) \) of the planet is \( 4.0 \times 10^{16} \mathrm{~m}^{2} / \mathrm{s} \). The least distance between planet and the sun is \( 2 \times 10^{12} \mathrm{~m} \). Then the maximum speed
\( \mathrm{P} \) of the planet in \( \mathrm{km} / \mathrm{s} \) is :
(A) 10
(B) 20
(C) 40
(D) None of these
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