A can do a piece of work in 10 days and b can do the same work in 20 days. With the help of c, they finish the work in 5 days . How long will it takes for c to complete alone
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A= 10 (2)
B= 20(1)
A+B+C=5 (4)
total work= 20
c= 20/1= 20 days will be the answer
B= 20(1)
A+B+C=5 (4)
total work= 20
c= 20/1= 20 days will be the answer
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