How many kg of pure salt must be added to 30kg of 2% solution of salt and water to increase it to a 10% solution?
Select the correct option
A) 8/3	B) 9/7	C) 7/4	D) 5/2	E) 6/7
8/3mount salt in 30kg solution = 2*30/100= 
<gadget id="calculator">2*30/100</gadget>
<output>3/5 = around 0.6</output>
0.6 kg   Let x kg of pure salt be added   then(0.6+x)/(30+x)=10/100   60+100x=300+10x   90x = 240   x = 8/3   8/3nswer is 8/3
<result>A</result>
How many kg of pure salt must be added to 30kg of 2% solution of salt and water to increase it to a 10% solution?