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

游客2025-02-27 41

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

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