Discussion of Question with ID = 078 under Time-and-Work

This is the discussion forum for this question. If you find any mistakes in the solution, or if you have a better solution, then this is the right place to discuss. A healthy discussion helps all of us, so you are requested to be polite and soft, even if you disagree with the views of others. The question and its current solution has also been given on this page.



A new tub can be filled by a tap in 9 minutes. But the tub is worn out, and there is a leakage that can empty the tub in 18 minutes. In how many minutes will the tap be able to fill the tub?


18 mins.


19 mins.


20 mins.


21 mins.

Ans: a

Putting x = 9 and y = 18 in the shortcut method, we get ${xy}/{y - x}$ = 18.

Comments and Discussion