A can do as much work in 5 days and B in 6 days. If both of them together can do the work in 12 days, in how many days can each of them complete the work?
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Answer:
a=5
in 1 day=x/5
b=6
in 1day=1/6
a+b=12
in 1 day=1/12
x/5+x/6 =x/12
6x+5x/30=x/12
11x/30=x/12
cross multi
132x=30x
x=4.4
a do in 4.4*5=22
bdo in4.4*6=26.4
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