A mixture of 20 kg of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25%  Choose one:
A) 4 kg	B) 5 kg	C) 8 kg	D) 30 kg	E) 35 kg
Exp. Water in the given mixture = 10*20/100= 
<gadget id="calculator">10*20/100</gadget>
<output>2</output>
2 kg,   4 kgnd spirit= (20-2)= 
<gadget id="calculator">(20-2)</gadget>
<output>18</output>
18 kg   Let x kg of water added, Then, x+2/20+x *100==25   4x+8 =20+x, or x =4 kg   4 kgnswer:4 kg
<result>A</result>
A mixture of 20 kg of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25%