in what proportion water to be mixed with spirit to gain 12.5% by selling it at cost price?  Pick one
A) 1:2	B) 1:3	C) 1:4	D) 1:8	E) 1:16
If the total quantity=100   Actual quantity of spirit to be sold to get 12.5% gain=100*100/112.5=800/9   So the water =100-(800/9)=100/9   Proportion of water:spirit =100/9 : 800/9= 1:8   ANSWER:1:8
<result>D</result>
in what proportion water to be mixed with spirit to gain 12.5% by selling it at cost price?