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Block A of weight 500 N and block B of w...

Block `A` of weight `500 N` and block `B` of weight `700 N` are connected by rope pulley system as shown. The largest weight `C` that can be suspended without moving block `A` and `B` is `W`. The coefficient of friction for all plane surfaces of contact is `0.3`. The pulleys are ideal. Find `(W)/(90)`.

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