After 57 liters of petrol were poured into the tank, it was still 5% empty. How much petrol must be poured into the tank in order to fill it?  Select the correct option:
A) 7 liters  B) 4 liters  C) 3 liters  D) 2 liters  E) 6 liters
95% ----------- 57   5% ------------ ?   =&gt; 3 liters   Answer: 3 liters
<result>C</result>
After 57 liters of petrol were poured into the tank, it was still 5% empty. How much petrol must be poured into the tank in order to fill it?