A and b can do a work in 60 days b and c can do a work in 120 days a and c can do a work in 80 days. a alone can do the work in how many days
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A and B work in a day=1/60
Let a be the days required by A
1/a+1/b=1/60
1/b+1/c=1/120
1/c+1/a=1/80solving a=96 days
Let a be the days required by A
1/a+1/b=1/60
1/b+1/c=1/120
1/c+1/a=1/80solving a=96 days
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