朱麗葉·安有天早上去上班,平均速度為40mph.她下班回家的時(shí)候平均速度為24mph.假如她上下班總共花了2小時(shí),那么她上班的路程有多遠(yuǎn)?
設(shè)路程為x,于是有方程
x/40 + x/24 = 2
解得x = 30 miles
故此選C.
英語翻譯
英語翻譯
Julie Ann commutes to work one morning at an average speed of 40 mph.She returns home along the same route at an average speed of 24 mph.If she spends a total of 2 hours traveling to and from work that day,how many miles is her commute to work?
(A) 24 (B) 30 (C) 32 (D) 34 (E) 40
Julie Ann commutes to work one morning at an average speed of 40 mph.She returns home along the same route at an average speed of 24 mph.If she spends a total of 2 hours traveling to and from work that day,how many miles is her commute to work?
(A) 24 (B) 30 (C) 32 (D) 34 (E) 40
英語人氣：386 ℃時(shí)間：2020-06-17 03:51:51
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