A and B togethers can finish a piece of work in 12 days . If A can finish the same work in 20 days ,in how many days B alone can finish it
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A and B togethers can finish a piece of work in 12 days . If A can finish the same work in 20 days ,in how many days B alone can finish it
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Answer:
Let,
A work alone in one day = 1/A= 1/20
A & B together work and complete the work in 12 days
so, 1/A + 1/B = 1/12
1/20 + 1/B = 1/12
1/B = 1/12 - 1/20
1/B = (20-12)/240
1/B = 8/240
1/B = 1/30
B = 30
So, that
B will work alone then, complete the work in 30days
I hope that it will help you
thanx