183.3333, and explanation

think it backwards:
step 6:100 + 30 which can run for 130mi.
step 5:100 + 45 +30: move 15mi more to consume 45ton
step 4:100 + 90 +30: move 15mi more to consume 45ton
step 3:100 +100 +30: move 3.333mi to consume 10 ton
step 2:100 +100+45+30: move 15mi to consume 45 ton
step 1:100+100+100: move 5 mi to consume 25ton

total: 5+(15+15+15+3.333)+130=183.333

所有跟帖： 

• your step 2 is wrong -sowhant- ♀ (116 bytes) () 10/07/2005 postreply 09:42:39