Question

. A and B can finish a work in 12 days,
B and Cin 15 days and A and Cin 20
days. In how many days would A
along finish the work?​

Answer 1

Answer:

in 16 days

Step-by-step explanation:

bcuz if A and B finished the work in 12 days that's mean A needs 6 days and B needs 6 days.

Again,if A and C needs 20 days to finish the work then they both need 10 days each.

So, total days needed for A alone is - 10+6

=16 days

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Answer 2

Answer:

A+B can finish the work 1/12 in one day.

B+C can finish the work 1/15 in one day

C+A can finish the work 1/20in one day

2(A+B+C) can finish the work (1/12+1/15+1/20)=1/5

A+B+C can finish the work in 1/10 in one day

A can finish the work 1/10-1/15=1/30

Hence A alone can finish the work in 30days