AMC 8 2009 Problem 6
AMC8 2009 年第 6 题
工程问题★★☆☆☆
Steve's empty swimming pool will hold 24,000 gallons of water when full. It will be filled by 4 hoses, each of which supplies 2.5 gallons of water per minute. How many hours will it take to fill Steve's pool?
Steve 家的游泳池当装满水时，能装 24,000 加仑的水。现在将由 4 个水管同时灌水，每个水管每分钟灌水 2.5 加仑。那么将 Steve 家的泳池灌满水要多少小时？
- A.40
- B.42
- C.44
- D.46
- E.48
正确答案 · Correct Answer
A
解析 · Solution
Solution 1
Each of the four hoses fills gallons of water. At the rate it goes, it will take minutes, or 40 hours.
If all four hoses fill 2.5 gallons a minute, every minute 10 gallons would be added. Since every hour has 60 minutes, 600 gallons of water would be added every hour. hours.
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