Yes it is.
Yes, in the Underworld it is. - Not just in the Underworld. It's REAL!! I've BEEN there!! - Read the book "In the footsteps of Orpheus" by RF Paget, for the exact location, in Baia, South of Naples, in Italy. - Don't just believe in 'Fairy Stories' - GO THERE, & see for yourself. Take a GOOD flashlight, as it's 120ft underground, reached by a long decending passageway. - But well worth a visit.
It isn't identical to any of the rivers you can find on the maps today. It still is only called the Styx. The River STYX is 120ft underground at Baia in Italy. For the exact location, read the book "In the Footsteps of Orpheus" by RF Paget, available from most libraries.
The area of a hexagon with the perimeter of 120ft is 1,039.2ft2
about 120ft
36.576 meters
10' x 12' = 120ft² 1yd² = 3ft x 3ft = 9ft² 120ft² / 9 ft² = 13.33yd²
2:1
120 feet is 40 yards.
120ft
120 feet=36.57600 meters
15 ft
approximately one half acre 120ft * 180ft = 21,600 ft^2 = 0.496 acres since 1 acre = 43,559.66 ft^2