Arithmetic Questions And Answers :: Chain Rule: part2

1.If 5 engines consume 6 metric tones of coal when each is running 9 hours day, how much 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 latter type ?

2.If 9 men working 7 hours a day can finish a work in 20 days; then how many days will be taken by 12 men, working 6 hours a day to finish the work; it being given that 3 men of latter type work as much as 2 men of the former type in the same time ?

3.15 men take 21 days of 8 hours each to do a piece of work. How many days of 6 hours each would 21 women take, if 3 women do as much work as 2 men ?

4.If 3 men or 6 boys can do a piece of work in 10 days will it take to complete a work twice as large with 6 men and 2 boys working together for 8 hours a day ?

5.In a hospital there is a consumption of 1350 litres of milk for 70 patients for 30 days. How many patients will consume 1710 litres of milk in 28 days ?