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One hour after Tom started walking from X to Y, a distance of 45 miles. Bob star
One hour after Tom started walking from X to Y, a distance of 45 miles. Bob star
游客
2024-01-12
65
管理
问题
One hour after Tom started walking from X to Y, a distance of 45 miles. Bob started walking along the same road from Y to X. If Tom’s walking rate was 3 miles per hour and Bob’s was 4 miles per hour, how many miles had Bob walked when they met?
选项
A、24
B、23
C、22
D、21
E、19.5
答案
A
解析
假设Bob走了n小时,那么(n+1)×3+n×4=45,得到n=6,Bob共走了4×6=24英里,选择A。
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