A and B, B and C, C and A work on a job consecutively for 2 days each and then complete the job. If all the three work together, then how many days will it take for them to complete the job?
Answers
Answered by
2
Answer:
Let A, B, C can do a job alone in a, b, c days.
A and B together can do in 2 days.
a
1
+
b
1
=
2
1
-------(1)
B and C together can do in 4 days.
b
1
+
c
1
=
4
1
------(2)
C and A together can do in
5
12
days.
c
1
+
a
1
=
12
5
-------(3)
(1) - (2), ⟹
a
1
−
c
1
=
4
1
-------(4)
(3) + (4), ⟹
a
2
=
12
8
∴a=3
∴ A can do job in 3 days.
Answered by
0
Answer:
you didn't told how much time the job takes to couple by 1 person ..
in my point of view it depends on how hard the job is if it's easy then they need 6 days to complet because each have doned job with each other consiq utly
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