Question

rama and krishna together can completes a work in 12 days . if rama alone can complete the work in 20 days , then find the number of days krishna alone takes to complete the same work

Answer 1

krishna will take 30 days

Answer 2

1/20+1/x=1/12

1/x=1/12-1/20

1/x=2/60

1/x=1/30

x=30

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