If 30 oxen can plough `1/7`th of the field in 4 hrs , in how many hour will 18 oxen take to do the remaining work?

If 30 oxen can plough (1)/(7)th of a field in 4 hours,in how many hours will 18 oxen take to do the remaining work?

A can do a piece of work in 24 hours while B alone can do it in 16 hours. If A, B and C working together can finish in 8 hours, in how many hours will C alone do the work?

If 36 men can do a piece of working 25 hours in how many hours will 15 men do it?

A ,\ B\ a n d\ C working together can do a piece of work in 8 hours. A alone can do it in 20 hours and B alone can do it in 24 hours. In how many hours will C alone do the same work?

A can do 50% more work than B in the same time. B alone can do a piece of work in 30 hours. B starts working and had already worked for 12 hours when A joins him. How many hours should B and A work together to complete the remaining work ?

Karim can do (1)/(4) of a work in 5 days.How many days will he take to 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?