急用请快答急用请快答
急用请快答y = 2 * x / (π* 3^2) = 2 * x / (9 π)计算溢出时间y = 10=> x = 45π得到y = 2 * x / (9 π) ( 0 = 0
1、y=2x/pi*3*3=2x/9 0<=y<=10,则 0<=x<=452、y=2x/9 [0,45] =10 (45,正无穷)