Prep T1-DS-Q32

[dianechiu]

32. 2818-!-item-!-187;#058&002974
Al, Pablo, and Marsha shared the driving on a 1,500-mile trip. Which of the three drove the greatest distance on the trip?

(1) Al drove 1 hour longer than Pablo but at an average rate of 5 miles per hour slower than Pablo.

(2) Marsha drove 9 hours and averaged 50 miles per hour.

ans:(E)
請問這題要怎麼思考? 謝謝

[小花]

Al, Pablo, and Marsha shared the driving on a 1,500-mile trip. Which of the three drove the greatest distance on the trip?

(1) Al drove 1 hour longer than Pablo but at an average rate of 5 miles per hour slower than Pablo.

(2) Marsha drove 9 hours and averaged 50 miles per hour.

問誰開的距離最長?
(1)
設P時速Vp 花X小時
則A Va=Vp-5 花X+1小時

Sp=Vp*X
Sa=(Vp-5)*(X+1)
not sufficient 無法比較Sp, Sa

(2)
Sm=9*50=450 但不知道Sp ,Sa
not sufficient

(1)(2)合起來看 還是不知道Sp ,Sa

所以E