here is my code
int main()
{

double l, h, w,N,angle;
double P=3.14;
double g=9.81,t,speed;
cin>>l>>h>>w;
t=sqrt(2*h/(g*100));
speed=w/60;
N=t*speed;
angle=N*360;
while(angle>360)
{
    angle=angle-1;
}
if(angle>90 && angle<270)
cout<<"bread";
else
cout<<"butter";


//system("pause");
}

i think you need to remember about l in counting time te total hight should be h-0,5l because you must remember that after h-0,5l it can spin arround. and you have few more mistakes but i'm not sure of that because my one its not perfect to