At a construction site, Raju can paint a wall in 36 hours, while Angad can do the same work in 18 hours. Sumit can paint the same wall in 24 hours. In how much time can they paint the wall if they all work together?
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 8 hours
According to the question
Raju * 36 hours = Angad * 18 hours = Sumit * 24 hours
Raju : Angad: Sumit = 2 : 4 : 3
Total work = 2 * 36 = 72 hours
if they all work together
then they can paint the wall = 72/(2 + 4 + 3) = 72/9 = 8 hours