Avi and Bindu can complete a project in four and twelve hours, respectively. Avi begins project at 5 a.m., and they work alternately for one hour each. When will the project be completed? |
9 a.m. 11 a.m. 1 p.m. 10 a.m. |
11 a.m. |
Avi = 4 hours, Bindu = 12 hours, ⇒ Avi started working at 5 am and they work on alternate hours, 1st hour = 3 units, 2nd hour = 1 unit, Every 2 hours, 4 units of work is done, So, in 6 hours, 12 units of work is completed, Therefore, 5 am + 6 hours = 11 am. |