. a and b can fill a tank in 11 days and a can fill an empty tank in 60 days. find in how many days can b fill the empty tank
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Given, A and B can fill a tank in 11 days
A can fill the tank alone in = 60 days
B can fill the tank alone in = 1/11 - 1/ 60 = (60-11) / 660 = 51/660
So B can fill the tank alone in 660/51 days
= 220/17
= 12 16/17 days.
B can do it alone in 12 16/17 days.
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