Heinz produces tomato puree by boiling tomato juice. The tomato puree has only 20% water while the tomato juice has 90% water. How many liters of tomato puree will be obtained from 50 litres of tomato juice?  Choose the correct choice from the following answers:
A) 2.8 liters.  B) 2.5 liters.  C) 8.5 liters.  D) 6.25 liters.  E) 2.1 liters.
Answer:   Explanation:   In each of the solutions, there is a pure tomato component and some water. So while boiling, water evaporates but tomato not. So we equate tomato part in the both equations.   â‡’â‡’ 10%(50) = 80%(x)   â‡’â‡’ x = 6.25 liters.   Answer:6.25 liters.
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Heinz produces tomato puree by boiling tomato juice. The tomato puree has only 20% water while the tomato juice has 90% water. How many liters of tomato puree will be obtained from 50 litres of tomato juice?