An inlet pipe fill a tank in 5 hrs and outlet pipe empty same tank in 36 hrs working indiviually.how many additional number of outlet pipes of same capacity required to be opened so that tank never over flows Choose the correct option.
A) 6  B) 7  C) 8  D) 9  E) 10
Inlet pipe fills the tank in 5 hr and outlet pipe empties the tank in 36 hr.   So inlet pipe is   36/5= 
<gadget id="calculator">  36/5</gadget>
<output>36/5 = around 7.2</output>
7.2 times efficient than , ensure that the an outlet pipe.   Therefore , in order to tank never overflows , we will need total 8 outlet pipes.   Already we have 1 outlet pipe , thus we need only  (8-1)= 
<gadget id="calculator"> (8-1)</gadget>
<output>7</output>
7 outlet pipes   ANSWER:7
<result>B</result>
An inlet pipe fill a tank in 5 hrs and outlet pipe empty same tank in 36 hrs working indiviually.how many additional number of outlet pipes of same capacity required to be opened so that tank never over flows