An Airplane with a Wingspan of 79

Multiple Choice

An airplane with a wingspan of 79.0 m flies parallel to the Earth's surface at a point where the downward component of the Earth's magnetic field is 0.490 × l0−⁴ T.If the induced potential between wingtips is 0.875 V,what is the plane's speed?

A) 54.3 m/s
B) 33.9 m/s
C) 226 m/s
D) 17 900 m/s
E) 111 m/s