If 9 engines consume 24 metric tonnes of coal, when each is working 8 hours a day; how much coal will be required for 8 engines, each running 13 hours a day, it being given that 3 engines of former type consume as much as 4 engines of latter type?

If 5 engines consume 6 metric tonnes of coal when each is running 9 hours a day,how many metric tonnes of coal will be needed for 8 engines,each running 10 hours a day,it being given that 3 engines,of the former type consume as much as 4 engines of the latter type? 3(1)/(8) b.8 c.8(8)/(9) d.6(12)/(25)

10 engines consume 80 litres diesel when each is running 9 hours a day. How much diesel will be required for 10 engines, each running 15 hours a day, whereas 6 engines of the former type consume as much as 5 engines of latter type?

10 engines consume 80 litres diesel when each is running 9 hours a day. How much diesel will be required for 10 engines, each running 15 hours a day, whereas 6 engines of the former type consume as much as 5 engines of latter type ?

4 men, each working 6 hours per day can build a wall in 9 days. How long will 6 men, each working 3 hours per day take to finish the same work?

If 9 men working 7 1/2 hours a day can finish a piece of work in 20 days, then how many days will be taken by 12 men, working 6 hours a day to finish the work? It is being given that 2 men of latter type work as much as 3 men of the former type. 11 b. 13 c. 9 1/2 d. 12 1/2

If 18 pumps can raise 2170 tonnes of water in 10 days working 7 hours a day; in how many days will 16pumps raise 1736 tonnes of water, working 9 hours a day? 6 b. 7 c. 8 d. 9