Question

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. thanks.

Answer 1

Isolde alone will finish the box in 3 weeks.

Explanation:

In terms of boxes per week, the rates are assumed to add up:

together = tristan + isolde

1/2 = 1/6 + isolde

3/6 - 1/6 = isolde = 2/6 = 1/3

Isolde alone eats 1/3 box per week, so a box will last 3 weeks.