SSC Delhi Police Constable 2025 Mock Test Series (New) Quantitative Aptitude Time and Work Work Efficiency
In a computer game, a builder can build a wall in 20 hours while a destroyer can completely demolish such a wall in 40 hours. In the beginning, both builder and destroyer were set to work together on a basic level. But after 30 hours the destroyer was withdrawn. What was the total time taken to build the wall?
1
33 h 30 min
2
35 h
3
35 h 15 min
4
32 h 45 min