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Jim can foll a pool carrying buckets of water in 330 minutes. Sue can do the same job in 45 minutes . Tony can do the same job in 1 1/2 hours . How quickly can all three fill the pool together ?

A. 12 minutes
B. 15 minutes
C. 21 minutes
D. 23 minutes
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সঠিক উত্তরঃ B. 15 minutes
Explanation: