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Pipe ‘A’ can fill a 210-litre tank in 10.5 hours. If pipe ‘A’ is 25% more efficient than pipe ‘C’ whereas pipe ‘B’ is 50% more efficient than pipe ‘C’, then find the time (in minutes) taken by all the given three pipes to fill the same tank together.

A 240 minutes

B 180 minutes

C 120 minutes

D 210 minutes

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