How many kg of pure salt must be added to 100kg of 10% solution of salt and water to increase it to a 15% solution?	Choose the most appropriate option:
A) A)5.8	B) B)1.3	C) C)9.6	D) D)12.5	E) E)7.9
5.8mount 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)=15/100   200+20x=300+3x   17x = 100   x = 5.8   5.8nswer is 5.8
<result>A</result>
How many kg of pure salt must be added to 100kg of 10% solution of salt and water to increase it to a 15% solution?