Halleys comet moves about the sunin an elliptical orbit, Ask an Expert

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Halley's comet moves about the Sunin an elliptical orbit, with its closest approach to the Sun being0.59 A.U. and its greatest distance being 35 A.U. (1 A.U. =Earth-Sun distance). If the comet's speed at closest approach is45 km/s, what is its speed when it isfarthest from the Sun? You may neglect any change in the comet'smass and assume that its angular momentum about the Sun is conserved.

km/s

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