What is the time required by B to complete the work alone?

A can (1/10) of the job in one day (or 3/30th). So B can do (5/30) – (3/30) = 2/30th of the task in one day. So B working alone will take 30/2 or 15 days. Therefore the time required by B to complete the work alone will be 15 days.

How long does it take for A and B to complete work?

A and B together can complete a work in 3 days. They start together but after 2 days, B left the work. If the work is completed after two more days, B alone could do the work in A can complete a piece of work in 18 days, B in 20 days and C in 30 days, B and C together start the work and forced to leave after 2 days.

How much work can be done by B in 15 days?

In 6 days, work done by A = (6/10)th of the total work. Work done by B in 1 day = (4/10)* (1/6) = (1/15)th of total work. So Total work can be done by B in 15 days. I would attempt to provide a simpler solution here.

How many days will 4 men complete the same job?

Each child takes twice as much Time a man takes to complete the same amount of job. In how many days will 4 men complete the same job. 19) Three women and four men can complete a work in 4 days. Two men and five women can complete the same work in 5 days. Find out the money received by a man for his work if a woman is paid Rs. 60 for her work.

How many days A B and C working together can complete work?

7) A and B can do a work in 12 days, B and C can do the same work in 15 days and A and C can complete the work in 20 days. In how many days A, B and C working together can complete the whole work? 8) A can finish the work in 16 days while B can finish the work in 8 days. After A started the work alone, B joined him after 4 days.

How long does it take to do a bit of work?

Q 1 – A can do a bit of work in 8 days, which B alone can do in 10 days in how long . In how long both cooperating can do it? A’s 1 day work= 1/8, B`s 1 day work = 1/10 ∴ (A+B) 1 day work = (1/8+1/10) = 9/40 Both cooperating can complete it in 40/9 days.

How many days does it take to complete 20 work alone?

A took 4 days to complete 20 work alone i.e. it did 5 work per day. (efficiencyis 5 of A). B took 5 days to complete 20 work alone,with the efficiency of 4 per day. A can do a work alone in 4 days. And same work B can complete in 5 days. And with the help of C they can do the work in 2 days.