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- #include<bits/stdc++.h>
- using namespace std;
- int main()
- {
- int i,j,t;
- double r1,r2,h,p,r ,ans,v,v1,x,v2,pi=acos(-1);
- cin>>t;
- for(i=1;i<=t;i++)
- {
- cin>>r1>>r2>>h>>p;
- r=((p*(r1-r2))/h)+r2;
- x=(h*r2)/(r1-r2);
- v1=(1/3.0)*pi*(r2*r2)*x;
- v2=(1/3.0)*pi*(r*r)*(p+x);
- v=v2-v1;
- printf("Case %d: %.10lf\n",i,v);
- }
- return 0;
- }
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