Question

A and B can do a piece of work in 12 days, B and C can do in 15 days ,C and A can do in 20 days. in how many days Can do it working altogether​

Answer 1

Answer:

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Answer 2

Answer:

Given:

A and B can do a piece of work in 12 Days =  1 /12

B and C can do a piece of work in 15 Days = 1 /15

A and C can do a piece of work in 20 Days =  1 /20

Now by adding the above values, we get,

2(A + B + C) (One Day Work)

= 1/12+1/15+1/20

= 5+4+3/60

= 12/60

= 1/5

Therefore,

A + B + C (One Day Work) = 1 /10  work.

C (One Day Work) = [A + B + C (One Day Work)] – (A + B)(One Day Work)

= 1/10-1/12

= 6-5/60

= 1/60

Therefore, C can complete the whole work in 60 days.