Question

Nishu archana can do piece of work in 10 days and b alone can do it in 12 days in how many days cannot do it alone

Answer 1

Answer:

5 days

Step-by-step explanation:

Part of work done in 10 days =1

work done in 1 day=1/10

or 1/n + 1/a=1/10

or 1/n=1/12

or 1/a=1/10 -1/12

or 1/a=2/10

therefore a= 5days

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