Working 3 hours a day, A can Complete a work in 10 days and working 5 hours a day, B can complete the same work in 3 days. Working 5 hours a day, they can jointly complete the work in-

Question: Working 3 hours a day, A can Complete a work in 10 days and working 5 hours a day, B can complete the same work in 3 days. Working 5 hours a day, they can jointly complete the work in-Solution:Working 3 hours a day, A can complete the work in 10 days∴ A can complete the work in = 3 × 10 = 30 hours∴ A can complete in 1 hour = 1/30 partWorking 5 hours a day, B can complete the work in 3 days∴ B can complete the work in = 5 × 3 = 15 hours∴ B can complete in 1 hour = 1/15 part(A + B)'s 1 hour's work, (1/30) + (1/15) = (1 + 2)/30 = 3/30 = 1/10∴ A and B can complete the work in 10 hoursSo, working 5 hours a day they require = 10/5 = 2 days to complete the work