首页
登录
职称英语
Donna is a mountain biking enthusiast. One Saturday, she spent the morning bikin
Donna is a mountain biking enthusiast. One Saturday, she spent the morning bikin
游客
2024-01-14
31
管理
问题
Donna is a mountain biking enthusiast. One Saturday, she spent the morning biking up an uphill trail at an average speed of 20 kilometers per hour, and then returned by the same route in the afternoon at an average speed of 25 kilometers per hour. If the downhill trip in the afternoon took 3/4 of an hour less than the uphill trek in the morning, how many kilometers did Donna ride each way?
选项
A、50
B、55
C、65
D、70
E、75
答案
E
解析
If x is the one-way distance in kilometers, then Donna’s time on the downhill ride can be expressed in hours as x/25. From the information in the question, you can form the equation
; you can restate the equation as 25x-375=20x, so 5x=375, and x=75 kilometers.
转载请注明原文地址:https://tihaiku.com/zcyy/3360474.html
相关试题推荐
Iarrivedlate,I______thetraffictobesoheavythismorning.A、wasn’texpecti
A:Morning!WhatcanIdoforyou?B:【D8】______A:Therearemanytravelpaths.
Theygotoworkeveryday______SaturdayandSunday.Thosedaysareholidays.A、be
Dr.Hampton:Goodmorning,ProfessorSmith.ProfessorSmith:______,Dr.Hampton
Themountainclimberhada______escapefromdeath.A、shortB、scarceC、closeD、nar
SpeakerA:Goodmorning,sir.CanIhelpyou?SpeakerB:Yes,I’mleavingtoday
Theoldmanisusedto()earlyinthemorning.A、exerciseB、exercisingC、exercise
—ABCBookingOffice.Goodmorning.______?—Yes,IwanttoflytoGuangzhouthed
______fromadistance,themountainlookslikeanoldman.A、SeeingB、HavingC、Se
Thetrainwill______fromPlatform2at3:45qnTuesdaymorning.A、departB、arri
随机试题
Thesechildrenlookedverynervousand______whentheywereonsuchabigstage
中国画(traditionalChinesepainting)是用毛笔、墨及颜料(pigment),在宣纸(Xuanpaper)、或绢(silk)
BillStoneisnotanastronaut—heistheworld’smostfamouscaver.Leadin
Ifyoulie____________(立誓之后),youcanbefoundguiltyofperjury.whileyouare
A.肺动脉瓣区第二音(P)亢进 B.剑突下见心脏搏动 C.心浊音界缩小或叩不
患儿男,10岁,25kg。拟在全麻下行脊柱侧弯矫形术,术前情况无特殊。需要监测脊
Passage1 Alyricisasubjectivepoem
以下物质中不影响人血浆中晶体渗透压的是A.钠B.蛋白质C.氯D.葡萄糖E.尿素
更换断路器的红灯泡时应注意哪些事项?
飞机按推进装置的不同,可分为( )。 A.近程飞机 B.螺旋桨飞机
最新回复
(
0
)