Question

A ,B ,c can do a work in 15, 20 and 12 days respeclively. Find how many days the work will take if they work together?

Answer 1

Answer:

Answer is 5 days

Step-by-step explanation:

A can do job in =15 days

1 day work of A =1/15

B can do job in=20 days

1 day work of b=1/20

C can do work in =12 days

1 day work of C =1/12

1 day work of a+b+c = 1/15+1/20/1/12

= 4+3+5/60

=12/60

=1/5

a+b+c can do job in =5 days

This is the easiest method of solving days one problems