Question: (A B C D) is a four-bar mechanism in which (A B=30 mathrm{~cm}) and (C D=45 mathrm{~cm} . A B) and (C D) are both

$A B C D$ is a four-bar mechanism in which $A B=30 \mathrm{~cm}$ and $C D=45 \mathrm{~cm} . A B$ and $C D$ are both perpendicular to fixed link $A D$, as shown in the Fig.1. If velocity of $B$ at this conditions is $V$, then velocity of $\mathrm{C}$ is

(a) $V$

(b) $3 / 2 V$

(c) $9 / 4 V$

(d) $2 / 3 V$

30 B A Fig.1 D 45

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