2. 外语
  3. A hiker walked for 3 days. She walked 18 miles on the first day, walking 3 miles per hour. On the second day she walked for one

A hiker walked for 3 days. She walked 18 miles on the first day, walking 3 miles per hour. On the second day she walked for one

admin2011-02-20  75
问题 A hiker walked for 3 days. She walked 18 miles on the first day, walking 3 miles per hour. On the second day she walked for one less hour, but she walked one mile per hour faster than on the first day. On the third day she walked the same number of hours as on the first day but at the same speed as on the second day. How many miles in total did she walk?
选项 A、24
B、44
C、58
D、60
E、62
答案E
解析 If she walked 18 miles on the first day at 3 mph, she walked for 6 hours. Following the question, we know that on the second day she walked for 5 hours at 4 mph to cover 20 miles, and on the third day she walked for 6 hours at 4 mph to cover 24 miles. The sum of 18, 20, and 24 is 62.
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