But if you shrink that diameter to what we're attempting, which is 12 feet, which is plenty to get an electric skate through, you drop the diameter by a factor of two and the cross-sectional area by a factor of four, and the tunneling cost scales with the cross-sectional area.
Bet, ja diametru samazina līdz mūsu iecerētajiem nepilniem 4 metriem, kas ir pietiekoši elektriskajai autoplatformai, diametrs samazinās uz pusi, un šķērsgriezuma laukums – četras reizes. Tuneļa izmaksas ir saistītas ar šķērsgriezuma laukumu,