用绳测井深,把绳三折来量,井外余2米;用绳四折来量,离井口还差一米,井深几米?绳长几米?
人气:233 ℃ 时间:2019-11-12 08:49:13
解答
设井深x米;
3x+4=4x+1
解得x=3;
则绳长 l=3x+4=13(尺);
推荐
- 以绳子测井深,把绳子3折入井底,井口上绳余4米,如果4折入井底,则井上只余1米,求井深几米?
- 以绳测井深,3折如井底,井口余13/3,如果4折如井底,井口上只余1米,求井深几米?
- 用一根绳子测井深,绳子三折后去测量,井口外多5米.把绳子四折后去测,井口外多3米,问井深几米,绳长几
- 用一根绳测井深,将绳三折去量,井口外余三米;四折去量,余一米.井深几米?绳长几米?
- 用对折的绳子测井深,剩余6米;若把绳子对折四下,则离井口1米,请问井深几米?绳长几米?
- 在四面体A-BCD中,AB⊥CD,AC⊥BD,证明AD⊥BC
- It is often () (wind)in spring,用所给词的适当形式填空
- 声音的强弱与声音的大小有什么区别?
猜你喜欢