Find the Volume of the Given Solid $z = 3 x ^ { 2 } + 9 y ^ { 2 }$

Short Answer

Find the volume of the given solid.
Under the paraboloid $z = 3 x ^ { 2 } + 9 y ^ { 2 }$ and above the rectangle $R = [ 0,3 ] \times [ 1,5 ]$ .