Question

A pump can fill a tank with water in 2 hours. because of la leak, it took 2 1/3 hours to fill the tank. the leak can drain all the water of the tank in: a

Answer 1

hello..

If the total area of pump=1 part
The pump take 2 hrs to fill 1 part 
The pump take1 hour to fill 1/2 portion 

Due to lickage  

The pump take 7/3 hrs to fill 1 part 
The pump take1 hour to fill 3/7 portion 

Now the difference of area = (1/2-3/7)=1/14 

This 1/14 part of water drains in 1 hour 
Total area=1 part of water drains in (1x14/1)hours= 14 hours 

So the leak can drain all the water of the tank in 14 hours. 

Leak will empty the tank in 14 hrs...

thank you ...

☺