$$1050\times \frac {70-25}{70} = 675$$ 
A rectangular water tank is filled to a depth of $$70$$cm. It contains $$1050$$ litres of water. Some water is taken out of the tank. The water level drops by $$25$$cm. How much water is left in the tank? 

(1) $$625\rm L$$ 
(2) $$375\rm L$$ 
(3) $$525\rm L$$ 
(4) $$270\rm L$$ 
(5) $$675\rm L$$ 