A and b together finish a work in 30 days they work together for 20days then b left after another 20days a finished the remaining work in how many days a alone can finish the work
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a and b both finish a work in 1/30 says
a can do work in 1/20 days
b left so remaining 1/20 days
1/30+1/20–1/20
a can do work in 1/20 days
b left so remaining 1/20 days
1/30+1/20–1/20
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