Problem Solving

OG 12

The ratio, by volume, of soap to alcohol to water in a certain solution is 2:50:100.The solution will be altered so that the ratio of soap to alcohol is doubled while the ratio of soap to water is halved.If the altered solution will contain 100 cubic centimeters of alcohol,how many cubic centimeters of water will it contain?

A)50

B)200

C)400

D)625

E)800

OA E

current ratio...new ratio

S:A=2:50.......4:50
S:W=2:100....2:200 or 4:400

hence new ratio S:A:W=4:50:400

so in a solution with 50unit l Alcohol 400 unit water will be present
hence for 100 unit alcohol 400*2=800unit water will be present

Ans option E