A man can complete a work in 4 days, whereas a woman can complete it in only12 days. If they work together, in how many days, can the work be completed?

Working 4 hours daily, Swati can embroid 5 sarees in 18 days. How many days will it take for her to embroid 10 sarees working 6 hours daily?

A sum of Rs. 2,500 deposited in a bank gives an interest of Rs. 100 in 6 months. What will be the interest on Rs. 3,200 for 9 months at the same rate of interest?

Two boys can finish a work in 10 days when they work together. The first boy can do it alone in 15 days. Find in how many days will the second boy do it all himself?

Three men A, B and C can complete a job in 8, 12 and 16 days respectively.

A and B work together for 3 days; then B leaves and C joins. In how many days, can A and C finish the work?