Task: Question Answering
Input (English): Question: 2 pipes can separately fill a tank in 20hrs and 30hrs respectively. Both the pipes are opened to fillthe tank, a leak develops in the tank through which one-third of water supplied by both the pipes goes out. What is the total time taken to fill the tank?

 Option A: 10 hrs

 Option B: 12 hrs

 Option C: 16 hrs

 Option D: 18 hrs

 Option E: 20 hrs
Output (English): Option C