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1. Smita, Monica and Reema can type a 50 page document in 4 hrs, if they work together. Smita herself can type it in 12 hrs and Reema can do it in 10 hours. Monica alone can type in it
(A): 10 hours
(B): 12 hours
(C): 15 hours
(D): 18 hours
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By: guest on 25 Apr 2018 03.17 pm
how its come
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