1.

A can do a job in 18 days and B can do it in 30 days. A and B working together will finish twice the amount of work in ------- days?

Answer»

21 ½ DAYS



1/18 + 1/30 = 8/90 = 4/45

45/4 = 11 ¼ *2 = 22 ½ days



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