Multivariable CalculusEasyDouble Integrals ShareDouble Integrals · Easy problemFind the average value of f(x,y)=x+yf(x,y) = x + yf(x,y)=x+y over the rectangle 0≤x≤20 \le x \le 20≤x≤2, 0≤y≤40 \le y \le 40≤y≤4.Check Show answer Walk through it step by step Practice more like this Review this concept