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