If A can complete a work in 12 days, B in 5 days, then find the time (in days) taken by them in each of the cases listed below : (a) When and work together. (b) When and work alternatively, and work ...

Efficiency and Time are inversely proportional , i.e., if X is 50% efficient as Y, then X takes twice the time taken by Y or if X is twice efficient as Y then X takes half the time taken by Y to ...