Question: The annulus (A) in the gear train shown in Fig. 15.50 rotates at (300 mathrm{rpm}) about the axis of the fixed wheel (S) having 80

The annulus $A$ in the gear train shown in Fig. 15.50 rotates at $300 \mathrm{rpm}$ about the axis of the fixed wheel $S$ having 80 teeth. The three arm spider is driven at $180 \mathrm{rpm}$. Determine the number of teeth required on the wheel $P$.

Spider. S Fig.15.50 Sun and planet type gear train

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