A pump can fill a tank with water in 4 hours. Because of a leak, it took 20 hours to fill the tank. The leak can drain all the water of the tank in? Choose the correct choice from the following options.
A) 1 B) 3 C) 5 D) 4 E) 2
P --&gt; Pump, L ---&gt; Leak   Pipe----------P---------L------------(P-L)--   Time---------4---------x-------------20   *   Rate---------5---------x-------------1   Work-------20---------20-----------20   Time required to empty the tank if leakage present = 20/((5) - 1)   = (20)/(4)= 
<gadget id="calculator">(20)/(4)</gadget>
<output>5</output>
5   Ans -5
<result>C</result>
A pump can fill a tank with water in 4 hours. Because of a leak, it took 20 hours to fill the tank. The leak can drain all the water of the tank in?