Question

A and B can do a piece of work in 9 days, B and C can do it in 12 days and C amd A do it in 18 days. in how many days will they finish the task if they all work together and seperately. ​

Answer 1

Answer:

In 8 days....

Step-by-step explanation:

A and B do a work in 9 days...

B and C do it in 12 days....

A and C do it in 18 days....

So, 1/A + 1/B = 1/9

     1/B + 1/C = 1/12

     1/A + 1/C = 1/18

So , 2/A + 2/B + 2/C = 1/4

                OR

      1/A + 1/B + 1/C = 1/8                          

So,  A, B & C together can do the work in 8 days.....

Answer 2

Answer:

see pic detailed answer is given...