Question

A,B,C can do a work in 12,15,20 respectively .all three can start work together. then how many days does work completed.​

Answer 1

Answer:

answer is here in the attachment..

if any doubt ask..

mark brainlist...plz

Answer 2

Answer:

5 days answer

Step-by-step explanation:

A can do a work=12 day's

B can do a work =15 days

C can do a work =20 days

A's 1 day's work=1/12

B's 1 day's work=1/15

C's 1 day's work=1/20

now A+B+C= 1/12+1/15+1/20

=5+4+3/60

=12/60

=1/5

so A, B, C can complete work in 5 days