Time and Work | RRB NTPC | 25-04-2020

A, B and C can do a certain piece of work in 4 days. A alone can do it in 12 days, B alone can do it in 10 days. In how many days C alone can complete the work?

10 men can complete a piece of work in 7 days working 9 hours per day. How many men can complete the same work in 14 days working 5 hours per day?

A pipe A can fill the tank in 10 hours another pipe B can empty the same tank in 15 hours. If both the pipes are opened together, then in how many hours tank will be completely filled?

A can complete a piece of work in 20 days. B and C can complete it in \({150\ \over 11}\) days. A and C can complete it in 12 days. In how many days B alone can complete the work?

A can do  of the work in 8 days. B can do  of the work in 9 days and C can do 20% of the work in 3 days. In how many A, B and C together can complete the work?

15 persons can do a work in 8 days. How many persons were required to complete one – third of the work in half the days?

A, B and C alone can complete a piece of work in 12, 15 and 18 days respectively. If all of them started the work together, then in how many days total work will be completed?

Ratio of efficiencies of A, B and C is 4 : 5 : 6. If the B can complete the work in 18 days, then in how many days, A and C together can complete the work?

1 man, 1 woman and 1 boy can finish the job in 30, 40 and 50 days respectively. How many men were required with 10 boys and 8 women to complete the work in 2 days?

15 men and 18 women can complete the work in 5 days. 2 men can complete the same work in 60 days. In how many days 5 women can complete the work?