Christopher bought 4 cans of soup for a total of $3.36,which included sales tax of $0.16. At the same per-can cost, what is the cost before the sales tax is added for 6 cans of the same soup?
【简答题】某航线由 A -B-C-D三个航节组成。由始发站A发来的载重电报得知:A-B航段的业载为400公斤,A-C航段的业载为910公斤,A-D航段的业载为2550公斤。由B站发来的载重电报得知:B-C航段的业载为540公斤,B-D航段的业载为630公斤。通过计算得知B站的最大业务载重量为9000公斤,C站的最大业务载重量为6900公斤,试分别计算B站、C站的过站业载和实际可用装载量。