// OB���h2009 Day2 G : Defend the Bases

#include <iostream>
#include <queue>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstring>

using namespace std;

class Edge{
public:
	int p, q; double cost;
	Edge(int p, int q, double cost) : p(p), q(q), cost(cost) {}
	bool operator < (const Edge &e) const { return cost > e.cost; }
};

const int INF = 10000000;
int cap[202][202];
double cost[202][202];

int maximumFlow(int s, int t, int n, double upper){
	int res = 0;
	while(true){
		vector<int> prev(n,-1); prev[s] = 0;
		queue<int> qu; qu.push(s);
		while(!qu.empty()){
			int e = qu.front(); qu.pop();
			for(int i=0;i<n;i++){
				if(cost[e][i] > upper) continue;
				if(cap[e][i]>0&&prev[i]<0){
					prev[i] = e;
					qu.push(i);
				}
			}
		}
		if(prev[t]<0) return res;
		for(int i=t;i!=prev[i];i=prev[i]) cap[prev[i]][i]--, cap[i][prev[i]]++;
		res++;
	}
	return res;
}

int main(){
	int n, m;
	while(cin >> n >> m, n){
		int x[100], y[100], v[100], xx[100], yy[100];
		vector<double> dst;
		int capa[202][202];
		memset(capa, 0, sizeof(capa));
		for(int i=0;i<n;i++) cin >> x[i] >> y[i] >> v[i];
		for(int i=0;i<m;i++) cin >> xx[i] >> yy[i];
		for(int i=1;i<=n;i++) capa[0][i] = 1;
		for(int i=1;i<=n;i++){
			for(int j=n+1;j<=n+m;j++) capa[i][j] = 1;
		}
		for(int j=n+1;j<=n+m;j++) capa[j][n+m+1] = 1;
		for(int i=0;i<n+m+2;i++)
			for(int j=0;j<n+m+2;j++) cost[i][j] = 0;
		for(int i=0;i<n;i++){
			for(int j=0;j<m;j++){
				double dx = x[i]-xx[j];
				double dy = y[i]-yy[j];
				cost[i+1][n+j+1] = sqrt(dx*dx+dy*dy)/v[i];
				dst.push_back(cost[i+1][n+j+1]);
				cost[n+j+2][i+1] = -cost[i+1][i+j+2];
			}
		}
		sort(dst.begin(), dst.end());
		int L = 0, R = dst.size()-1;
		while(L!=R){
			int mid = (L+R)/2;
			memcpy(cap, capa, sizeof(capa));
			if(maximumFlow(0, n+m+1, n+m+2, dst[mid])==m) R = mid;
			else L = mid + 1;
		}
		printf("%.8lf\n",dst[L]); 
	}
}