A circular wheel travels along a flat surface at a constant rate of 2.5 feet per

游客2024-01-12 23

问题 A circular wheel travels along a flat surface at a constant rate of 2.5 feet per second. How many complete revolutions will the wheel make in 50 seconds if its diameter is 3 feet?

选项 A、6
B、10
C、13
D、14
E、19

答案 C

解析 50秒内轮子走过的距离：轮子的周长(πd)×圈数。50×2.5=π×3×revolutions=13＜revolution＜14。

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A circular wheel travels along a flat surface at a constant rate of 2.5 feet per

Howmuchlongeristheedgeofacubewithasurfaceareaof1,350thantheedge

Acircularwheeltravelsalongaflatsurfaceataconstantrateof2.5feetper

Inthefigureabove,theareaofthecircularregionwithcenterOis16π,ifAB

Dr.TonegawawontheNobelPrizefordiscoveringhowthebodycanconstantlycha

ElNino,theperiodicabnormalwarmingoftheseasurfaceoffPeru,aphenomenon

In1974alargeareaofthesurfaceofMercurywasphotographedfromvaryingdis

Incontrastwithadarksurfaceanditstendencytowardheatabsorption,alarge

[img]ct_gre5image038[/img]Arectangularlabelisattachedtoarightcircularc

[img]ct_gre5image022[/img]If9treesareoriginallyplantedinacircularpatte

[img]ct_4image006[/img]Asquaredartboardhasfourdarkcircularregionsofra

Since1895theNationalTrusthasworkedforthepreservationofplacesofh

[audioFiles]2015m3s/audio_ezfj_ezflisteningd_20151_128[/audioFiles]

[originaltext]M:Wheredoyougetyourideasfrom,Mrs.Rowling?W:Wherethei

[originaltext]Hungryforthebrighteststudents,manyofthecountry’sstron

主变压器重瓦斯动作是由于(C)造成的。(A)主变压器两侧断路器跳闸；

例行巡视钢构支架防腐涂层（）。完好、无锈蚀$;$排水孔畅通$;

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