Chain Rule - Questions and Answers

21. A garrison of 500 men had provisions for 24 days. However, a reinforcement of 300 men arrived. The food will now last for :

22. If 300 men can do a piece of work in 16 days, how many men would do (1/5) of the work in 15 days ?

23. 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 ?

24. 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 ?

25. 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 ?