How many litres of pure acid are there in 15 litres of a 20% solution Choose the correct option:	A) 4	B) 5	C) 2	D) 3	E) 1
Explanation:
Question of this type looks a bit typical, but it is too simple, as below... It will be 15 * 20/100= 
<gadget id="calculator">15 * 20/100</gadget>
<output>3</output>
3 Answer: Option 3
<result>D</result>
How many litres of pure acid are there in 15 litres of a 20% solution