A and B together can do a piece of work in 12 days, while A alone can complete the same work in 18 days. How long will B alone take to complete the work?
Answer & explanation
Correct answer: option 4
A + B = 12 days, A = 18 days,
⇒ A + B = 3 (Efficiency)
⇒ 2 + B = 3,
⇒ B = 1,
⇒ Time required for B to complete the work = \(\frac{36}{1}\) = 36 days, ..(\(\frac{Work}{Efficiency}\) = Time)