Question

a and b can finish a work in 30 days b and c can finish it 15 days and c and a can finish it 10 days how much days will it take to complete if they work together

Answer 1

Answer:

10

Step-by-step explanation:

a+b = 1/30_____(1)

b+c = 1/15______(2)

c+a = 1/10_______(3)

adding equation 1,2&3

2(a+b+c) = 6/30 = 1/5

a+b+c = 1/10

so they work together complete in 10 days