A and B complete a work in 2 days. If A alone can do it in 38 days, then B alone can do 9 times of the same work in ______________ days.
Given:
A and B together complete the work in 2 days.
A alone can complete the work in 38 days.
Solution:
Total work = LCM of ( 2, 38) = 38
Efficiency of A + B = unit per day
Efficiency of A = = 1 unit per day
Efficiency of B = 19 - 1 = 18 unit per day
9 times of the work = 9
B alone complete the work = days
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