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Answered by
2
60/12 = 5 days will be the answer
helper1124:
a pe square h
-2, -6
kese
3( a² + 8 a + 12 )= 0
a²+ 8a+ 12 = 0
a²+ 6a + 2a + 12 = 0
a(a+6) + 2(a+6) = 0
a+6 = 0 , a +2 = 0
a = -6, -2
thank you
Answered by
3
A can do pa job in 12 days
So, A's 1 day work = 1/12
In the same way,
B's 1 day work = 1/15
C's 1 day work =1/20
therefore,
A, B and C together do the job in 1/12+1/15+1/20=12/60
= 1/5
A, B and C together can do the job in 5 days
So, A's 1 day work = 1/12
In the same way,
B's 1 day work = 1/15
C's 1 day work =1/20
therefore,
A, B and C together do the job in 1/12+1/15+1/20=12/60
= 1/5
A, B and C together can do the job in 5 days
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