Question

a and b together can complete a work in 12 days. if a is two times as good as a workman as b in how many days will a alone finish the work​

Answer 1

Answer:

24

Step-by-step explanation:

12×2=24

2 people =12

1 person = 24

Answer 2

Answer:

18 days.

Step-by-step explanation:

Let us consider the number of days required for A to do the work be x

Given, A is twice good a workman as B.

S, the number of days required for B to do theveork should be 2x (the more efficient you are, the less the time you take).

So, now, A's 1 day's work is 1/x.

Similarly, B's 1 day's work is 1/2x.

So, now A and B can together complete 1/x + 1/2x amount of work in 1 day.

Now, it is given that they can do a work together in 12 days.

So, from here, we can see that in 1 day, A and B can do 1/12 part of their work.

So, 1/x + 1/2x = 1/12

So, (2 + 1)/2x = 1/12

So, 3/2x = 1/12

So, from here we see that x = 18.

So, A alone takes 18 days to complete the work.