Q17:
D
· ·
B C
A E
In the figure, points A, B, C, D, and E lie on a line. A is on both circles, B is the center of the smaller circle, C is the center of the larger circle, D is on the smaller circle, and E is on the larger circle. What is the area of the region inside the larger circle and outside the smaller circle?
(1) AB = 3 and BC =2
(2) CD =1 and DE = 4
Q35:
Stations X and Y are connected by two separate, straight, parallel rail lines that are 250 miles long. Train P and train Q simultaneously left Station X and Station Y, respectively, and each train traveled to the other’s point of departure. The two trains passed each other after traveling for 2 hours. When the two trains passed, which train was nearer to its destination?
(1) At the time when the two trains passed, train P had averaged a speed of 70 miles per hour.
(2) Train Q averaged a speed of 55 miles per hour for the entire trip
Q35
1，我认为条件1说的是当两车碰面的时候，P的平均点速度是70，也就是说在那一瞬间是70，之前的速度并不知道，平均速度可能大于70，也可以小于70！
2，就算条件1说的是前两小时的平均速度，那么也改选A阿，因为P走了140，Q就走了250减140等于110啊！
而条件B只说了全程的平均速度，没说那两小时的平均速度，不能得到答案！
请指正！ | 
离终点的距离