When tristan visits isolde on valentine's day, he's planning to bring her a one pound box of chocolates. he knows that when they share a one pound box of chocolates, it usually lasts for two weeks. when he eats a one pound box of chocolates on his own it lasts for six weeks. how long should a one pound box of chocolates last if isolde eats it alone? note: assume they don't eat faster or slower when they are alone, tristan eats alone for six weeks how much does isolde eat, tristan and isolde are tow different people.