如图用两道绳子捆扎着三瓶直径均为的酱油瓶,若不计绳子接头(取

如图用两道绳子捆扎着三瓶直径均为的酱油瓶,若不计绳子接头(取3),则捆绳总长为           

 

答案

96cm

解析:一道绳子为两部分来计算。其中3条半径为4的120°的弧所以为一个圆周。而另一部分为3条相等的线段,因为圆与圆之间为相切关系所以3条线段的长度为8。所以一道绳子的长度为:2R+3*8=3*8+24=48,r所以两道为48*2=96。

 

相关题目

I know you don’t like ____ music very much. But what do you think of ____ musi
I know you don’t like ____ music very much. But what do you think of ____ music in the film we saw yesterday?   A. /; /           B. the; the         C. the; /         
如图,已知∠1=∠2,AC=AD,增加下列条件:①AB=AE;   ②BC=ED
如图,已知∠1=∠2,AC=AD,增加下列条件:①AB=AE;   ②BC=ED;③∠C=∠D;④∠B=∠E.其中能使   △ABC≌△AED的条件有………(      ) A.1个    
高级住宅区一般位于城市边缘的原因是( ) A.那里地价比
高级住宅区一般位于城市边缘的原因是( ) A.那里地价比较便宜               B.那里环境条件比较好 C.城市中心不可建住宅区        
It is reported that thousands of people ______ since a terrible earthquake hit N
It is reported that thousands of people ______ since a terrible earthquake hit Nepal.A. died                B. have died         C. have been dead         D. will die
There are also instructions about the      of all the buttons and switches
There are also instructions about the      of all the buttons and switches. A.purpose          B.function               C.power          D.effect
如图所示,是小文和小南运动的路程与时间关系图线。依照
如图所示,是小文和小南运动的路程与时间关系图线。依照示例再写出两条有关的信息。示例:小南运动的速度为3.3m/s;信息一:              
(09年武汉二中调研)半径为的球面上有A、B、C三点,AB=6,BC
(09年武汉二中调研)半径为的球面上有A、B、C三点,AB=6,BC=8,AC=10,则球心到平面ABC的距离为          .
 为了测量某化工厂的污水排放量,技术人员在该厂的排污管
 为了测量某化工厂的污水排放量,技术人员在该厂的排污管末端安装了如图所示的流量计,该装置由绝缘材料制成,长、宽、高分别为a、b、c,左右两

最新题目