|
Un article trouvé pour ce sujet.
 |
|
|
|
|
|
|
|
|
Making toys |
2001-12-17 |
|
Karen pose la question :
Jonathan and Morgan are two of Santa's elves. Jonathan can make a toy in eleven hours. Morgan can make the same toy in nine hours. How long it take for both Jonathan and Morgan to make the toy if they were working together?
Claude Tardif lui répond. |
|
|
|
