Prepositions Summary

A alone can complete a work in 30 days while B alone can complete the same work in 20 days. In how many days both working together can complete the same work?

A contract is to be completed in 75 days and 187 men are to work 15 hours per day. After 65 days, \(3\over5\) of the work is completed. How many additional men should be employed, so that the work is completed in time, each man now working 17 hours per day?

25 persons can complete a work in 60 days. They started the work. 10 persons left the work after x days. If the whole work was completed in 80 days, then what is the value of x ?

Two friends A and B take a job for Rs. 8000. Had they worked alone, A would have taken 15 days while B would have taken 40 days. They started working together but after 6 days, A left and B completed the remaining work alone. Find the difference between their share.