Question

9. A and B can complete a work in 2 and 6 days respectively. If Calon can
complete the work 13 days, in how many days can they complete same
work, if all the three work together?​

Answer 1

Answer:

39/29 days or 1.74 days

Step-by-step explanation:

A's one day work = 1/2

B's one day work = 1/6

C's one day work = 1/13

if all the three work together their one day work will be

1/2 + 1/6 + 1/13

=> (39 + 13 + 6) / 78

=> 58/78

=> 29/39

when we take the reciprocal, we will get the number of days required to complete the job if all the three work together

=> 39/29 => 1.74 days