Area Between Curves with number b where b=y

Question

Find the number b such that the line y = b divides the region bounded by the curves y = 25x² and y = 16 into two regions with equal area.

I tried to solve with using integrals with parameters of b and 16 and vice versa but still get the incorrect answer.

Answer 1

You and I both got fooled! No integrals needed!

The answer is obvious! Remember y=25x² is a parabola which is symmetric with respect to the y axis.

b=0!!!!!!