The distance he traveled in yards is 191.25 yards.
What is Pythagora's theorem?
Using Pythagorean theorem
Each of the diagonal/slant line makes right triangle with sides of the field
Let Li represents the slant lines
Let's evaluate each
L₁² = 20² + 53.33²
= 400 + 2844.09
L₁² = 3244.09
L₁ = √3244.09
= 56.96 yds
L₂² = 30² + 53.33²
= 900 + 2844.09
= 3744.09
L₂ = √3744.09
= 61.19 yds
L₃² = 50² + 53.33²
= 2500 + 2844.09
= 5344.09
L₃ = √5344.09
= 73. 10 yds
To distance covered = L₁ + L₂ + L₃
= 56.96 + 61.19 + 73.10
= 191.25 yards.