[問題]GWD24-33

[amyliang]

33
Anne traveled from City A to City B in 4 hours, and her speed was between 25 miles per hour and 45 miles per hour. John traveled from City A to City B along the same route in 2 hours, and his speed was between 45 miles per hour and 60 miles per hour. Which of the following could be the distance, in miles, from City A to City B?
A. 95 B. 115 C. 125 D. 160 E. 180
Answer B

...完全不知道怎麼做..麻煩會的人教一下...thank you

[小花]

Anne走的距離可能為
25*4=100
45*4=180
100~180

John走的距離可能為
45*2=90
60*2=120
90~120

取100~180和90~120的交集
故B

[amyliang]

Thank you so much