18 litres of mixture contains 20% alcohol and the rest water. If 3litres of water be mixed with it, the percentage of alcohol in the new mixture would be?
Pick:
A) 16.67%  B) 17.14%  C) 18.3%  D) 19.75%  E) 21.23%
Alcohol in the 18litres of mix. = 20% of 18litres = (20*18/100)= 
<gadget id="calculator">(20*18/100)</gadget>
<output>18/5 = around 3.6</output>
3.6litres   water in it= 18-3.6= 
<gadget id="calculator">18-3.6</gadget>
<output>14.4</output>
14.4litres   new quantity of mix.= 18+3= 
<gadget id="calculator">18+3</gadget>
<output>21</output>
21 litres   Quantity of alcohol in it= 3.6litres   Percentage of alcohol in new mix. = 3.6*100/21 = 17.14%   Answer is 17.14%
<result>B</result>
18 litres of mixture contains 20% alcohol and the rest water. If 3litres of water be mixed with it, the percentage of alcohol in the new mixture would be?