If velocity of block \( B \) in the given arrangement is \( 300 \mathrm{~mm} / \mathrm{sec} \). ...

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If velocity of block \( B \) in the given arrangement is \( 300 \mathrm{~mm} / \mathrm{sec} \). towards right. Then velocity of \( A \) will be :
Figure \( 1.146 \)
(A) \( 200 \mathrm{~mm} / \mathrm{sec} \)
(B) \( 100 \mathrm{~mm} / \mathrm{sec} \)
(C) \( 450 \mathrm{~mm} / \mathrm{sec} \)
(D) \( 150 \mathrm{~mm} / \mathrm{sec} \)
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