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Description:
  กรีน
Language: C/C++
Code:

          #include <stdio.h> 
int main() 

     float r,l,cr; 
     printf("radius:"); 
     scanf("%.2f",&r); 
        printf("length:"); 
     scanf("%.2f",&l); 
      cr=3.14*r*r*l; 
      printf("cylinder Area:%.2f",cr); 

scanf("%.2f",&l); 
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