Arithmetic Questions And Answers :: Chain Rule: part3

6.A garrison had provisions for a certain number of days. After 10 days (1/5)th of the men desert and it is found that the provisions will now last just as long as before. How long was that :

7.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 ?

8.15 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 ?

9.If 5 men working 6 hours a day can reap 3 field in 20 days, in how many days will 15 men reap the field, working 8 hours a day ?

10.A contractor undertakes to do a piece of work in 40 days. He engages 100 men at the beginning and 100 more after 35 days and completes the work in stipulated time. If he had engaged the additional men, how many days behind schedule would it be finished ?