How much distance saved, in terms of percent, in diagonal of the square compared to the along sides?
The side of the square is a.
=> Diagonal size is = Sq. root of (a^2 + a^2) = Sq. root of (2a^2) = (approx) 1.41a
=> Distance saved is = (2a - 1.41a/2a) *100% = 0.59/2*100 = (approx) 30%