#include<bits/stdc++.h>
#define INF 999999999
using namespace std;

double dist(pair<double, double> a, pair<double, double> b){
    return sqrt((a.first-b.first)*(a.first-b.first)+(a.second-b.second)*(a.second-b.second));
}

pair<double, double> a, b;
int v1, v2;
double mindist, ld, rd;

void binary(int l, int r){
    int m1=l+(r-l)/3;
    int m2=l+2*(r-l)/3;
    if(l>=r)return;
    double md1=dist(a, make_pair(m1, 0))/v1+dist(b, make_pair(m1, 0))/v2;
    double md2=dist(a, make_pair(m2, 0))/v1+dist(b, make_pair(m2, 0))/v2;
    if(md1<mindist)mindist=md1;
    if(md1<md2){
        if(ld<m2)binary(l, m1);
        else binary(m1, m2);
    }
    else if(md1<rd)binary(m1, m2);
    else binary(m2, r);
}

int main()
{
    int t;
    scanf("%d", &t);
    for(int i=0; i<t; i++){
        int xx, xx_, yy, yy_;
        scanf("%d %d %d %d %d %d", &xx, &yy, &xx_, &yy_, &v1, &v2);
        a=make_pair(xx, yy), b=make_pair(xx_, yy_);
        if(a.first==b.first){
            cout<<fixed<<setprecision(5)<<b.second/v2-a.second/v1<<endl;
        }
        else{
            int lx=a.first, rx=b.first;
            if(lx>rx)swap(lx, rx);
            ld=dist(a, make_pair(lx, 0))/v1+dist(b, make_pair(lx, 0))/v2;
            rd=dist(a, make_pair(rx, 0))/v1+dist(b, make_pair(rx, 0))/v2;
            mindist=min(ld, rd);
            binary(lx, rx);
            cout<<fixed<<setprecision(5)<<mindist<<endl;
        }
    }



    return 0;
}