Two marbles are sitting side by side in a glass container. The base of the container is 10 units long and the radius of the smaller marble is 2 units. What is the radius of the larger marble? Describe the strategy you are going to use to answer the question.

Answer 1

no idea. What shape is the container? Do the marbles touch all of the nearest sides of the container? Only one side? Any sides at all?

Lots of specifics left out here.