Give Good Estimates of Lower and Upper Bounds For $\int _ { 1 } ^ { 2 } \int _ { 0 } ^ { 2 } x y \sqrt { x ^ { 2 } + y ^ { 2 } } d x d y$

question 67

Essay

Give good estimates of lower and upper bounds for $\int _ { 1 } ^ { 2 } \int _ { 0 } ^ { 2 } x y \sqrt { x ^ { 2 } + y ^ { 2 } } d x d y$ .

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