Physics question below?

Question

A rectangular loop of wire is moving toward the bottom of the page with a speed of 0.019 m/s (see the drawing). The loop is leaving a region in which a 2.9 T magnetic field exists; the magnetic field outside this region is zero. During a time of 2.0 s, what is the magnitude of the change in the magnetic flux?

http://www.webassign.net/CJ/22_16.gif

Answer 1

The area in the field in dropping at a rate of 0.019m/s * 0.08m = 0.00152m^2/sec. Over a period of 2 sec the area has reduced by 2*0.00152 or 0.00304m^2. The flux density = 2.9T = 2.9 weber/m^2. Therefore the flux change is 2.9*0.00304 = 0.00882 weber