Neha can check a pile of 60 answer sheets in 4 hours and Manoj can check the same pile in 6 hours. If they share the pile and work at the same time, how long will it take?

Explanation

1. 01

   Together: $\frac{1}{4} + \frac{1}{6} = \frac{5}{12}$ of the pile per hour.

2. 02

   Time = $\frac{12}{5}$ hours = 2 hours + $\frac{2}{5} \times 60$ minutes = 2 hours 24 minutes.