uva problem 12578 10:6:2 solution

#include<bits/stdc++.h>
#include<math.h>
using namespace std;
int main()
{
    double num, r,s;
    int t;
    scanf("%d",&t);
    while(t--){
        scanf("%lf",&num);
    r=num/5;
    r=r*r;
    r=acos(-1)*r;
    s=(6*num)/10;
    s=s*num;
    printf("%0.2lf %0.2lf\n",r,s-r);
    }
    return 0;
}