timrelawan06
17.08.2021 •
Mathematics
124. 114. ‘A’ can do a piece of work in 7 days of 9 hours each and 'B' can do it in 6 days of 7 hours each. How long will they take to do it, working together 8 hours a day? (a) 3 days (b) 6 days (c) 9 days (d) 12 days
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