最新提问
我的动态
登录后查看动态
题目内容双击单词支持查询和收藏哦～
It took Ellen 6 hours to ride her bike a total distance of 120 miles. For the first part of the trip, her speed was constantly 25 miles per hour. For the second part of her trip, her speed was constantly 15 miles per hour. For how many miles did Ellen travel at 25 miles per hour?
D显示答案
以上解析由 考满分老师提供。
