Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.33 T. When viewed edge-on, the first surface is tilted at an angle of 28° from the horizontal, and a net magnetic flux of 6.8 x 10-4 Wb passes through it. The same net magnetic flux passes through the second surface.
(a) Determine the area of the first surface.
(b) Find the smallest possible value of the area of the second surface.