用绳子测桥高,2折量还余8米;如果3折量还余1米.求桥高和绳长各多少米?我好急
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 22:53:14
![用绳子测桥高,2折量还余8米;如果3折量还余1米.求桥高和绳长各多少米?我好急](/uploads/image/z/14432027-59-7.jpg?t=%E7%94%A8%E7%BB%B3%E5%AD%90%E6%B5%8B%E6%A1%A5%E9%AB%98%2C2%E6%8A%98%E9%87%8F%E8%BF%98%E4%BD%998%E7%B1%B3%3B%E5%A6%82%E6%9E%9C3%E6%8A%98%E9%87%8F%E8%BF%98%E4%BD%991%E7%B1%B3.%E6%B1%82%E6%A1%A5%E9%AB%98%E5%92%8C%E7%BB%B3%E9%95%BF%E5%90%84%E5%A4%9A%E5%B0%91%E7%B1%B3%3F%E6%88%91%E5%A5%BD%E6%80%A5)
用绳子测桥高,2折量还余8米;如果3折量还余1米.求桥高和绳长各多少米?我好急
用绳子测桥高,2折量还余8米;如果3折量还余1米.求桥高和绳长各多少米?
我好急
用绳子测桥高,2折量还余8米;如果3折量还余1米.求桥高和绳长各多少米?我好急
设x=绳子长,y=桥高.
x/2-8=y.(1)
x/3-1=y.(2)
把(1)带入(2) 解得 x=42
把x=42带回(1) 解得y=13