Question

A & b can do a job for 15 days, b & c for 20 days, c & a for 60 days. find the time taken by a, b, c combined together?

Answer 1

a & b= 15 days
a= 15 days
b= 15days

b & c= 20days
so a= 15 days
b= 15+ 20 = 35 days
c= 20 days

c & a = 60 days
a= 15+ 60 = 75 days
b= 35 days
c= 20+ 60 = 80 days..

therefore , a does a job for 75days
where b does a job for 35 days &
c does a job for 80 days
so c does a job for more days then a and then followed by b.

hope it helps...!!!