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

游客2025-02-27 20

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

Thetopsurfaceareaofasquaretabletopwaschangedsothatoneofthedimensi

Acircularrim28inchesindiameterrotatesthesamenumberofinchespersecon

MostofEarth’ssurfaceisocean.Theoceanfloorisinaccessibleforextensive

In1974alargeareaofthesurfaceofMercurywasphotographedfromvaryingdis

f(t)=ktforallt,wherekisaconstant,andf(3)=1/2ColumnA

[img]ct_gre5image022[/img]If9treesareoriginallyplantedinacircularpatte

[img]ct_4image006[/img]Asquaredartboardhasfourdarkcircularregionsofra

Johnisbuildingacircularfencearoundhiscircularpool.Thepoolis26feet

IfSustainablecompetitiveadvantagedependsonworkforceskills,American

TherearepeopleinItalywhocan’tstandsoccer.NotallCanadianslovehoc

Whatimpactcanmobilephoneshaveontheirusers’health?Manypeopleworry

[originaltext]W:Lookwhatamessyou’vemade!I’vetoldyouseveraltimes,but

某铁矿由露天转地下开采。露天开采规模为600×104t／a，采场最高标高+120

俗语说：“师生如父子。”这句话的真正内涵是()A.师生关系就是父子关系 B.

良性肿瘤的局部表现包括A.多发常见 B.无包膜 C.形状规则 D.质地硬

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