Four grapefruit (considered spheres) 6
in. in diameter and place in a square box whose inside base dimensions are 12
in. in the space between the first four grapefruit a fifth of the same diameter is placed. How deep must the box be so that the top will just touch the fifth grapefruit?
A,b,c,D,E is the center of the grapefruit ..
ABCD is a square