speed = V = 1.24 x 10^5 m/sec
magnetic field = B = 0.8 T
radius = r = 30 cm = 0.3 m
B * q * V = m * V^2 / R
m/q = B * R / V
= 0.8 * 0.3 / 1.24 X 10^5
= 0.19 X 10^-5 Kg/C = 1.9 X 10^-6 Kg/C
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