A and B can complete a work in 36 days and 45 days respectively. They worked together for 2 days and then A left the work. In how many days will B complete the remaining work?

40.5

A = 36 days, B = 45 days,

⇒ Before A left, they both worked for 2 days = (5 + 4) x 2 = 18 units

⇒ Remaining work = 180 - 18 = 162 units.

⇒ Time taken by B to complete remaining work = \(\frac{162}{4}\) = 40.5 days.