CUET Preparation Today
Tap A can fill a tank in 12 hrs and tap B can empty it in 15 hrs. If both taps are open alternatively and pipe A opened first, then in what time tank will be filled completely? |
120 hrs. 121 hrs. 110 hrs. 111 hrs. |
111 hrs. |
So, it will take total 111hrs. to fill the tank. |
