Anand takes 9 days more than his father to do a certain piece of work. Together they can do the work in 6 days. How many days will Anand take to do that work alone?

A takes 9 days more than B to do a certain piece of work. Together they can do the work in 6 days. How many days will A alone take to do the work?

B takes 16 days less than A to do a certain piece of work. If both working together can complete the work in 15 days, in how many days will B alone complete the work ?

A can do a certain work in 15 days, while working together, A and B can do the same work in 7.5 days. How many days will B alone take to do the same work ?

A can do a certain work in 15 days, while working together, A and B can do the same work in 7.5 days. How many days will B alone take to do the same work?

Pintu takes 6 days more than those of Nishu to complete certain work. If they work together, they finish it in 4 days. How many days would it take to complete the work if they work alone?

Pintu takes 6 days more than Nishu to complete certain work. If they work together, they finish it in 4 days. How many days would it take to complete the work if they work alone?

A takes 4 days more to finish certain piece of work than that of B. If working together they can finish the work in 8(8)/(9) days. Then in how many days working alone each can finish the work?