Answer:
1 - (1/3 x 2) = 4 inches (The equation may not be exactly correct but the answer of 4 inches is.)
Step-by-step explanation:
The beetle has 4 inches, 2 of which it already had before hand.
4 - 2 = 2
1/3 distance that the ant is would be 2 inches, so then you would find the number that 2 is one third of.
1/3 = 2/6
1 - 2/6 = 4/6
The ant is 4 inches below ground level.