How many kg of pure salt must be added to 100kg of 10% solution of salt and water to increase it to a 12% solution? Answers
A) A)6.7  B) B)2.3  C) C)9.6  D) D)12.5  E) E)7.9
Amount salt in 100kg solution = 10*100/100= 
<gadget id="calculator">10*100/100</gadget>
<output>10</output>
10 kg   Let x kg of pure salt be added   then(10+x)/(100+x)=12/100   250+25x=300+3x   22x = 50   x = 2.3   Answer is 2.3
<result>B</result>
How many kg of pure salt must be added to 100kg of 10% solution of salt and water to increase it to a 12% solution?