a can do a peice of work in 9 days where as b can do same work in 18 days.they began the work together but before 3days of work completion ,a leaves.the time taken to complete the work is?
(1) 7 days
(2)5days
(3)8days
(4)11days
plz answer fast
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Step-by-step explanation:
work done by A and B in 2 days
(3+2)×2=5units/day×2
= 10 units
work left : 36−10=26 units
and it will be complete by 'B' alone
work leftB′s efficiency=262=13days
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