Four construction machines of equal efficiency can do a work in 24 days, and 6 destructive machines can undo the same work in 48 days. How much time will it take for 10 construction and 6 destruction machines to complete the same work?

A and B working together can complete a work in 10 days. If A works at half of his efficiency and B works at thrice of his efficiency, they can complete the work in 6 days. In how many days can A complete the work at his normal efficiency?

A is thrice as efficient as B and takes 10 days less than B takes to do the same work. In howmany days, B alone can finish the whole work?

A can do a piece of work in 8 days and B can do the same work in 10 days. They started the work together but after 3 days, A left . In how many days B can complete the remaining work?

Three machines, X, Y, and Z, can complete a task in 8 hours, 10 hours, and 12 hours, respectively. If they start working one after the other (X, then Y, then Z), how long will it take to complete the task?(APPROX)

Select the correct answerA and B together can finish a work in 5 days. If A works twice his efficiency they can finish the same work in 3 days. In how many days will A alone finish the work?Options5.4 days7.5 days6.6 days15 days