Water tank problem


#1

A tank has 100 liters of water. At the end of every hour, the following two operations are performed in sequence: i) water equal to m% of the current contents of the tank is added to the tank ,ii) water equal to n% of the current contents of the tank is removed from the tank. At the end of 5 hours, the tank contains exactly 100 liters of water . The relation between m and n is :
m=n
mn
None of the previous


#2

The relationship between m and n is
M is greater than n
If we add m% to 100 liters of waters we have (100+m)liters and now on removing n% we have {(100+m)-n *(100+m)/100} liters of water in order to retain 100 liters of water n should be lesser than m because m% of 100 have to be equal to n% of (100+m) litres