Mohan takes 6 hours to do a job. Laltu takes 10 hours to do the same job. How long should it take if Mohan and Laltu work together the same job?

If 4 men or 6 women can do a piece of work in 12 days working 7 hours a day. How many days will it take to complete a work twice as large with 10 men and 3 women working together 8 hours a day?

If A and B can finish a work in 10 days, B and C can finish the same work in 12 days, C and A can finish the same work in 15 days; then in how many days can A, B and C together finish half of the wor…

Two persons A and B working together, can dig a trench in 8 hours, while A alone can dig it in 12 hours. In how many hours B alone can dig the same trench?

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?

Anil and Suman together can do a work in 12 days, which Anil alone can do in 20 days. If Suman alone has to do this work, he will take