Fourteen machines can produce 500 units in 12 hours. After four hours poduction, two more machines were started. How many hours will it take to complete the production of 500 units ?

Twenty four children can complete a work in twelve days whereas sixteen men can complete the same work in nine days. In How many days will twelve men and twelve children comlete the same work ?

A report of 100 pages is to be typed by three typists.
Typist A can type 100 pages in 10 hours.
Typist B can type the same pages in 20 hours. and 
Typist C can type in 25 hours,
All the three typist started typing at 09:00 A.M. At 01:00 P.M., Typist A stopped typing. The other two typist finished the job Approximately at what time the report was typed ?

If x men can do a piece of work in 8 days and (x+4) men can do the same work in 6 days, then x is equal to

A, B and C contract a work for Rs. 550. Together A and B do 7/11 of the work. The share of C (in rupees) is