A man of height 1.8 metre is moving away from a P lamp post at the ...

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A man of height 1.8 metre is moving away from a
P lamp post at the rate of \( 1.2 \mathrm{~m} / \mathrm{sec} \). If the height of

W the lamp post be 4.5 metre, then the rate at which the shadow of the man is lengthening is
(1) \( 0.4 \mathrm{~m} / \mathrm{sec} \)
(2) \( 0.8 \mathrm{~m} / \mathrm{sec} \)
(3) \( 1.2 \mathrm{~m} / \mathrm{sec} \)
(4) None of these
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