System is shown in the figure. Velocity of sphere \( A \) is \( 9 \mathrm{~m} / \mathrm{s} \). T...

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System is shown in the figure. Velocity of sphere \( A \) is \( 9 \mathrm{~m} / \mathrm{s} \).
Then speed of sphere \( B \) will be
(a) \( 9 \mathrm{~m} / \mathrm{s} \)
(b) \( 12 \mathrm{~m} / \mathrm{s} \)
(c) \( 9 \times \frac{5}{4} \mathrm{~m} / \mathrm{s} \)
(d) None of these
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