If the area of a circle is 81π, then the diameter of the circle is

admin2019-02-01 21

问题 If the area of a circle is 81π, then the diameter of the circle is

选项 A、9
B、18
C、36
D、9π
E、18π

答案B

解析 The formula for the area of a circle is πr2. Therefore, the radius of this circle is the square root of 81, or 9. The diameter is twice the radius, so 18.

转载请注明原文地址:https://kaotiyun.com/show/NRtO777K

本试题收录于： GMAT QUANTITATIVE题库GMAT分类

GMAT QUANTITATIVE

GMAT

相关试题推荐

Wehearthattheywill______anewschoolhere.
Weshallhaveanopportunitytoexchange______tomorrow.
Forthispart,youareallowed30minutestowriteacompositiononthetopic:OnFoodSafety.Youshouldwriteinnolessthan
Robertlookedasifhewereaboutto______whenhismotiveswerequestioned.
Mancannotgoonincreasinghisnumberatthepresentrate.Inthenext30yearsmanwillfaceaperiodofcrisis.Someexperts
Televisionhaschangedthelifestyleofpeopleineveryindustrializedcountryintheworld.IntheUnitedStates,wheresociolo
Itwasnotmuchfuntotravelononeoftheoldsailingships.Lifewashardforbothpassengersandcrew.17thcenturysailing
Nomatterwhoyouareorwhereyoucomefrom,onethingiscertain:youareacquaintedwiththemosquito(蚊子)—althoughyouprobab
AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair
Myjobwastomakeclassroomobservationsandencourageatrainingprogramthatwouldenablestudentstofeelgoodaboutthemsel

随机试题

职工一方的协商代表因更换造成空缺的，应在空缺之日起内按照相关规定产生新的代表。()
1/3
磺脲类降糖药主要适用于
根据我国现行宪法和立法法的规定，下列选项中哪一行为与宪法或法律不相抵触?
[2011年，第82题]RLC串联电路如图7．2-30所示，在工频电压u(t)的激励下，电路的阻抗等于()。
城市工程管线综合规划中常见的工程管线主要有六种,不正确的是()。
反洗钱的义务主体包括()。
按照《企业会计准则第4号——固定资产》规定．下列会计处理方法正确的是()。
在教学中，教师应充分发挥主动性，创造性地使用教科书和_______________。
一个圆柱的底面周长比原来减少20％，要使圆柱的体积增加一倍，现在的高度与原来的高度之比为：

最新回复(0)

If the area of a circle is 81π, then the diameter of the circle is

GMAT QUANTITATIVE

GMAT

Wehearthattheywill______anewschoolhere.

Weshallhaveanopportunitytoexchange______tomorrow.

Forthispart,youareallowed30minutestowriteacompositiononthetopic:OnFoodSafety.Youshouldwriteinnolessthan

Robertlookedasifhewereaboutto______whenhismotiveswerequestioned.

Mancannotgoonincreasinghisnumberatthepresentrate.Inthenext30yearsmanwillfaceaperiodofcrisis.Someexperts

Televisionhaschangedthelifestyleofpeopleineveryindustrializedcountryintheworld.IntheUnitedStates,wheresociolo

Itwasnotmuchfuntotravelononeoftheoldsailingships.Lifewashardforbothpassengersandcrew.17thcenturysailing

Nomatterwhoyouareorwhereyoucomefrom,onethingiscertain:youareacquaintedwiththemosquito(蚊子)—althoughyouprobab

AsTheplanecircledovertheairport,everyonesensedthatsomethingwaswrong.Theplanewasmovingunsteadilythroughtheair

Myjobwastomakeclassroomobservationsandencourageatrainingprogramthatwouldenablestudentstofeelgoodaboutthemsel

职工一方的协商代表因更换造成空缺的，应在空缺之日起内按照相关规定产生新的代表。()

1/3

磺脲类降糖药主要适用于

根据我国现行宪法和立法法的规定，下列选项中哪一行为与宪法或法律不相抵触?

[2011年，第82题]RLC串联电路如图7．2-30所示，在工频电压u(t)的激励下，电路的阻抗等于()。

城市工程管线综合规划中常见的工程管线主要有六种,不正确的是()。

反洗钱的义务主体包括()。

按照《企业会计准则第4号——固定资产》规定．下列会计处理方法正确的是()。

在教学中，教师应充分发挥主动性，创造性地使用教科书和_______________。

一个圆柱的底面周长比原来减少20％，要使圆柱的体积增加一倍，现在的高度与原来的高度之比为：