Arithmetic Questions And Answers :: Chain Rule: part1

16.On a scale of a map 0.8 cm. represents 8.8 km. If the distance between two points on the map is 80.5 cm., the distance between these points is approximately :

17.20 men complete one-third of a piece of work in 20 days. How many more men should be employed to finish the rest of the work in 25 more days ?

18.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 ?

19.120 men had provisions for 200 days. After 5 days, 30 men died due to an epidemic. The remaining food will last for ?