A and B together can complete a piece of work in 35 days while A alone can complete the same work in 60 days. B alone will be able to complete the same work in :
Answer & explanation
Correct answer: option 3
The above chart was obtained after following the details of the question:
Efficiency of A+B = 12
Efficiency of A = 7
Efficiency of B = 12-7 = 5
Days required by B alone to complete the work = \(\frac{420 }{5 }\) = 84 days