Chain Rule

1

A contractor employed 30 men to do a piece of work in 38 days . after 25 days , he employed 5 men and the work was finished one day earlier . How many days he would have been behind . if he had not employed additional men ?


A. 1
B. `1 1/4`
C. `1 3/4`
D. `1 1/2`

2

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 not engaged the additional men, how many days behind schedule would it be finished ?

A. 3
B. 5
C. 6
D. 9

3

A contractor undertook to do a certain piece of work in 9 days . He employed certain number of men , but 6 of them being absent from he very first day. the rest could finish the work in 15 days . The number of men originally employed were :

A. 12
B. 15
C. 15
D. 24

4

A garrison had provisions for a certain number of days . After 10 days , `1/5` of the men desert  and it is found that the provisions will now last just as long as before . How long was hat ?

A. 15 days
B. 25 days
C. 35 days
D. 50 days

5

A garrison of 500 men had provisions for 27 days. After 3 days a reinforcement of 300 men arrived . For how many more days will the remaining food last now ?

A. 15
B. 16
C. `17 1/2`
D. 18