Question

A,B and C do apeace of work in8,12,15 days respectively.how long will it take to finish if they work together

Answer 1

Answer:

A s one day work =1/8

B s one day work =1/12

C s one day work =1/15

As + Bs + C's one day work =1/8+1/12+1/15=33/120

Total time taken by A B C =1/(33/120)=120/33 days