20 lines
417 B
C++
20 lines
417 B
C++
#include<stdio.h>
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#include<math.h>
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#include<stdlib.h>
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#include<string.h>
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int main()
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{
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int T;
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double s, l1, l2, v1, v2;
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scanf("%d", &T);
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while(T--)
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{
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scanf("%lf%lf%lf%lf", &l1, &l2, &v1, &v2);
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s=cos(1)*1.55741*v2*(l1-10)/v1/sin(1);
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if(s<0)printf("0\n");
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else if(s>l2)printf("%.0lf\n", l2);
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else printf("%.0lf\n", s);
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}
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return 0;
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}
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