Vinay and Praveen working together can paint the exterior of a house in 6 days. Vinay by himself can complete the job in 5 days less than Praveen. How long will it take Vinay to complete the job.

Working 5 hours a day, a work can be completed in 30 days. Let's find, how long it would take to complete the work, working 6 hours a day.

20- men, decided to complete the repairing work, of a house in 30 days. But after 6 days 8 men feel sick. Let's find, how long they will take to complete the work.

If 5 men working 6 hours a day can complete a work in 20 days , in how many day s will 15 men complete the work working 8 hours a day ?

2 men and 6 boys together can do a piece of work in 5 days . 8 men and 3 boys together can do the same work in 3 days . In how many days 1 man and 3 boys together can do the same work ?

Laxmi and Kartik together complete a work in 4 days. If they work seperately, then the time taken by Kartik would be 6 days more than the time taken by Laxmi. Calculate the time taken by Laxmi alone to complete the work.

Mary and David can do a work individually in 10 days and 15 days respectively. At first Mary alone worked for 4 days, then David alone worked for 5 days and left. Maria came and completed the remaining work in 4 days. If Mary, David and Maria would work together. let’s calculate in how many days they would complete the work.