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两队合修一条水渠,甲队修完全程的12还多7.2千米,乙队修的相当于甲队的13.这条水渠全长千米.

题目详情
1
2
还多7.2千米,乙队修的相当于甲队的
1
3
.这条水渠全长______千米.
1
2
1122
1
3
.这条水渠全长______千米.
1
3
1133
▼优质解答
答案和解析
设这条水渠的总长度看x千米,
1
2
x+7.2)+
1
3
×(
1
2
x+7.2)=x,
           
1
2
x+7.2+
1
6
x+2.4=x,
                   
2
3
x+9.6=x,
                        
1
3
x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
1
2
111222x+7.2)+
1
3
×(
1
2
x+7.2)=x,
           
1
2
x+7.2+
1
6
x+2.4=x,
                   
2
3
x+9.6=x,
                        
1
3
x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
1
3
111333×(
1
2
x+7.2)=x,
           
1
2
x+7.2+
1
6
x+2.4=x,
                   
2
3
x+9.6=x,
                        
1
3
x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
1
2
111222x+7.2)=x,
           
1
2
x+7.2+
1
6
x+2.4=x,
                   
2
3
x+9.6=x,
                        
1
3
x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
1
2
111222x+7.2+
1
6
x+2.4=x,
                   
2
3
x+9.6=x,
                        
1
3
x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
1
6
111666x+2.4=x,
                   
2
3
x+9.6=x,
                        
1
3
x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
2
3
222333x+9.6=x,
                        
1
3
x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
1
3
111333x=9.6,
                          x=28.8;
答:这条水渠全长28.8千米.
故答案为:28.8.
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