Travelling costs good money. Discuss how to travel at a lower cost and explain which ideas in the bubbles seem to be the most realistic. Then suggest some of your own ideas.

R=ro*L/S
P = U^2/R=U^2*S/(ro*L)
L =U^2*S/(ro*P) = 120^2*pi*0,25^2/(4*1,2 *360) м =
1,636246 м ~ 1,636 м ~ 164 cм