Depends on the film. For most kinds, about 15 feet and for tech pan (has a thinner base), 20 feet. If you have the usual Nikor 70mm spiral, it's 15 feet I think.

I take it you bought 2405 from the Canadian guy? It's good stuff but 150 FEET per can not 150m. I develop it for about 8:00-9:00 in Xtol 1+1 rotary and you can get EI400 from it. More like 160 in slower developers like Rodinal and HC110.