问两道prep模板题

wakesleep2011

Malik's recipe for 4 servings of a certain dish reqiures 1.5 cups of pasta, According to this recipe ,what is the number of cups of pasta that Malik will use the next time he prepare this dish

(1) Thye next time he prepares half as he ndid the last time as he did the last time he prepare the dish
(2) Malik used 6 cups of pasta the last time he prepared this dish

DS题，我看不明白。。。。


还有道quantitative，

Susan drove at an average speed of 30 miles per hour for the first 30 miles of a trip and then at average speed of 60 miles per hpur for the remaining 30 miles of the trip. If she made no stops during the trip, what was Susan's average speed, in miles per hour, for the entire trip.

我算是45，答案是40.。。。

夜夜箫歌

Susan drove at an average speed of 30 miles per hour for the first 30 miles of a trip and then at average speed of 60 miles per hpur for the remaining 30 miles of the trip. If she made no stops during the trip, what was Susan's average speed, in miles per hour, for the entire trip.
总时间T=30/30+30/60=1.5h
平均速度=总路程除以总时间=（30+30）/1.5h=40m/h

夜夜箫歌

DS题的意思是M的食谱上说4份某菜需要1.5杯的pasta,问题是，根据这个食谱，M下次做这道菜的时候需要多少杯的pasta
条件一：下一次M需要做上一次一半的菜（句子是不是打错了，感觉中间重了）
条件二：M上一次用了6杯pasta做菜（证明了上次做了16份菜）
一和二一起才能推出来吧。条件一给出的是这次和上次的菜得份数关系，条件二给了上次做了多少分菜。
额，还有啊，有时候一些题目搜百度搜不到，搜谷歌可能会有答案啊~这样遇到不会的题目可以效率很多，很快找到答案~

lastjuly

THX~

Roxas605

同样受教了～