Priya and Debu individually completes a work in 10 hours and 12 hours respectively. If they do the work together, let’s calculate in how many hours they will 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.

My friend Rina can do garden work alone in 4 hours. I can do that work alone in 3 hours. But if we together do that work, let’s calculate how much time will be needed.

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 ?

A and B can complete (2)/(3) rd of a piece of work , if A work 3 days and B work 4 days together. While they can complete (11)/(12) part of the work.if A work 3 days and B works 6 days together. In how many days A and B will complete the work seperately.

How is the work done related to the heat produced when work is completely converted into heat?