16 workers working 6 hours a day can build a wall of length 150 metres, breadth 20 m and height 12m in 25 days. In how many days 12 workers, working 8 hours a day can build a wall of length 800 m, breadth 15 m and height 6 m.

5 men working 8 hours a day can completely build a wall of length 20 metres, breadth 1/4 metre and height 6 metres in 3 days. How many days will 8 men working 6 hours a day require to build a wall of length 120 meters, breadth 1/2 metre and height 4 metres.

16 workers working 8 hours per day can demolish a building in 32 days. In how many days 24 workers working 12 hours per day can demolish the same building?

10 men working 8 hours day can do a work in 30 days. In how many days will 12 men working 4 hours a day take do the same work?

24 workers can build a wall in 15 days. How many days will 9 workers take to build a similar wall?