Question

a and b can do a piece of work in 12 days b and c in 15days and c and a in 20 days how much time will a alone take to finish the work​

Answer 1

Answer:

10 days

Step-by-step explanation:

A+B = 1/12

B+C = 1/15

C+A = 1/20

(A+B)+(B+C)+(C+A) = 1/12 + 1/15 + 1/20

L.C.M of 12, 15, 20 is 60

2(A+B+C) = 5/60 + 4/60 + 3/60

2(A+B+C) = 12/60

A+B+C = 12/60*2

A+B+C = 1/10

So, A,B, & C together can complete the work in 10 days .

Please appreciate the effort!