首页
登录
职称英语
An aircraft flew from A to B at an average speed of 230 mph. It returned from B
An aircraft flew from A to B at an average speed of 230 mph. It returned from B
游客
2024-08-21
6
管理
问题
An aircraft flew from A to B at an average speed of 230 mph. It returned from B to A at an average speed of 300 mph. What was its average speed for the two journeys?
选项
答案
260 mph
解析
(设飞机从A到B耗时a小时,从B到A耗时b小时,那么可得出230a=300b;飞机飞行整个路程中所用的平均速度则为300b/(a+b);将两个方程式合并,便可得出平均速度约为260.3 mph,四舍五人后取结果260mph。
转载请注明原文地址:https://tihaiku.com/zcyy/3728771.html
相关试题推荐
Attheeatingcontestthewinnerateanaverageof15hotdogsatthefirst20s
Duringanaverageyear,about50peoplediefromcarbonmonoxidepoisoningin
Duringanaverageyear,about50peoplediefromcarbonmonoxidepoisoningin
Duringanaverageyear,about50peoplediefromcarbonmonoxidepoisoningin
Duringanaverageyear,about50peoplediefromcarbonmonoxidepoisoningin
Duringanaverageyear,about50peoplediefromcarbonmonoxidepoisoningin
ThegraphbelowshowstheaveragemonthlyexpensesofcollegestudentsinCh
Thechartbelowshowstheaveragehoursworkedperdaybymarriedmenandwomen
Lancereturnedtocyclingandtrainingonlyfivemonthsafterhewas______diagno
Acollisionbetweenanaircraftandoneormorebirdsistermedabird-strik
随机试题
Asoccerreferee【B1】______forscoringagoalwhiletakingchargeforagame
[originaltext]M:HiTracy!Whatdoyouthinkofourclassonchildren’sliterat
IntroductionLinguisticshasbothpracticalandphilosophica
[originaltext](I=Interviewer;V=Victoria)I:Victoria,Iwonderthen,i
Thanksgivingisa(tradition)______festivalintheUSandCanada.traditional本题考
下列可作为核定建设项目交付资产的实际价值依据的是( )。A.工程项目竣工决算价
测定非特异性细胞免疫功能A.免疫印迹法B.细胞毒试验C.反向溶血空斑试验D.E花
下列指数中,属于个体指数的是()。A.海尔电冰箱的价格指数 B.衣着类价格指数
下列哪些病因导致的心衰不宜使用血管扩张剂进行.治疗? A.二尖瓣狭窄B..
(2018年真题)宜用水飞法进行炮制的中药是( )A.雄黄 B.芒硝 C.
最新回复
(
0
)