Two Long Conducting Cylindrical Shells Are Coaxial and Have Radii

Two long conducting cylindrical shells are coaxial and have radii of 20 mm and 80 mm. The electric potential of the inner conductor, with respect to the outer conductor, is +600 V. An electron is released from rest at the surface of the outer conductor. What is the speed of the electron as it reaches the inner conductor? (e = 1.60 × 10^-19 C, ^mel = 9.11 x 10^-31 kg, k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²)

A) 1.1 × 10⁷ m/s
B) 1.3 × 10⁷ m/s
C) 1.5 × 10⁷ m/s
D) 1.7 × 10⁷ m/s
E) 1.9 × 10⁷ m/s