A can do 40%work while b can do 60% in hoe many days both a and b complete the work
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1/ a + 1/b = 1/ work done in1 day
1/ 40 +1 /60 =1 /x
5/120 =1 / x
x=120/5
x =24 days
1/ 40 +1 /60 =1 /x
5/120 =1 / x
x=120/5
x =24 days
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