I got the answer as 400(B) which is wrong and the actual answer is supposedly(E). The way I worked out my answer was by stating Volume (of Frustum) is proportional to the height of the frustum. Since height ratio or depth ratio is 4:5 for the regular and large drink respectively, I then multiplied the volume by 5/4 as a result of this proportionality. This lead me to 400. But this is wrong.
Please help!