Esther drove to work in the morning at an average speed of 4

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/05/16 09:26:11

Esther drove to work in the morning at an average speed of 45 miles per hour.She returned home in the evening along the same route and averaged 30 miles per hour.If Esther spent a total of one hour commuting to and from work,how many miles did Esther drive to work in the morning?

suppose Esther spend x hours drove to work and spend y hours returned home then

45*x = 30*y
x+y = 1

then x= 30/75

then S = 45 * x = 30*45/75= 18
18 miles Esther drive to work in the morning

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