Magnetic Flux through a Loop Calculation

[BuBbLeS01]

Simple Magnetic Flux Prob...

Homework Statement

What is the magnitude of magnetic flux through the loop? (a=22 cm, b=27 cm, B1=1.2 T, B2=1.7 T.)

Homework Equations

MF = AB cos theta

The Attempt at a Solution

MF = AB
So wouldn't I just do ((0.2m * 0.2m) * 1.2) + ((0.22m * 0.27m) * 1.7)
but that's not getting me the right answer...what am I doing wrong?

 

[Troels]

Remember that the fields point in opposite directions in the two regions...

 

[BuBbLeS01]

oh yea thank you!