Question

The ratio of working efficiencies of A and B is 4:5. If A alone completes the work in 15 days, then in how many days can B alone complete the work? *

Answer 1

Step-by-step explanation:

Then B being 30% more efficient does 1.3 units per day 3. A completes work in 15 days 4.If A nad B works together they will complete 1+1.3=2.3 units per day; So number of day

Answer 2

Answer:

19 days

Step-by-step explanation:

working efficiencies of a and b = 4x &5x

a alone complete work = 15 days

therefore b alone complete work = (5x × 15)/4x

= 18.75

=19 day approx