Designed by: Amy Yang,

Eric Jiang, Terry Tao

• Story Line• One day, Amy is on her way to school. After she started walki

ng for 5 minutes, her mom discovered that she forgot to bring her lunch. So her mom decided to pursue her. Amy walked with the speed of 40m per minute, her mom walked with the speed of 85m per minute, and the distance between her home and the school is 1800m.

• Question:

• Could her mom reach her before she arrived the school and how long would she take?

Cartoon:

Amy's Home

Amy's School 1800 M

Answer:

•Amy's leading distance: 5×40=200m

•Mom's using time: 1800÷(85-40)=40mins

•Amy's using time: (1800-200)÷40=40mins40mins=40mins ; 40mins is not greater than 40 minsAs a result, her mom could reach her before she arrived school,

and it took her 40mins to reach Amy.