If m men can do a work in r days, then the number of days taken by (m + n) men to do it is :

A, B and C completed a work costing Rs. 1800. A work for 6 days, B for 4 days and C for 9 days. If their daily wages ar…

A can finish a work in 24 days, B in 9 days and C in 12 days. B and C start the work but are forced to leave after 3 day…

A can do a piece of work in 12 days and B in 24 days. If they work together, in how many days will they finish the work …

A group of workers was put on a job. From second day onwards, one worker was withdrawn each day. The job was finished wh…

The time taken by 4 men to complete a job is double the time taken by 5 children to complete the same job. Each man is t…

639 persons can repair a road in 12 days working 5 hours a day. In how many days will 30 persons working 6 hours a day c…

The daily wages of A and B respectively are Rs. 3.50 and Rs. 2.50. When A finishes a certain work, he gets a total wage …