A and B can do a piece of work in 12 days, B and C in 15 days and C and A in 20 days. In how many days will they finish it together and separately?
the answer of this question is =10,30,20,60
plz tell how can I do it and the example of this question is this 2nd pic
the answer of this question is =10,30,20,60
plz tell how can I do it and the example of this question is this 2nd pic
Answers & Comments
Verified answer
Answer:
PLS MARK AS BRAINILIEST
Step-by-step explanation:
A and B can do a work in 12 days, B and C in 15 days, and C and A in 20 days.
Calculations:
According to the question,
A and B can do the work in 12 days
so, (A + B)’s one day’s work = 1/12
Similarly, (B + C)’s one day’s work = 1/15
and (C + A)’s one day’s work = 1/20
On adding all three,
2(A + B + C)’s one days’ work = (1/12) + (1/15) + (1/20)
⇒ (5 + 4 + 3)/60 = 12/60 = 1/5
⇒ (A + B + C)’s one days’ work = 1/10
A, B and C together can finish the whole work in 10 days.
A, B, and C together can finish twice the whole work in 20 days.
∴ the correct answer is 20 days