A comet moves in an elliptical orbit with an eccentricity of e = 0.20 around a star. The distance between the perihelion and the aphelion is 1.0 × 10^8 km. if the speed of the comet at perihelion is 81 km/s. then the speed of the comet at the aphelion, is

Q: A comet moves in an elliptical orbit with an eccentricity of e = 0.20 around a star. The distance between the perihelion and the aphelion is 1.0 × 108 km. if the speed of the comet at perihelion is 81 km/s. then the speed of the comet at the aphelion, is

(a) 182 km/s

(b) 36 km/s

(c) 121.5 km/s

(d) 54 km/s

Ans: (d)