Given, maximum distance of comet from the Sun, r1=1.6×1012m Minimum distance of comet from the Sun, r2=8.0×1010m Speed of the comet at nearest point, v2=6×104ms−1 Applying law of conservation of angular momentum, mv1r1=mv2r2(∵ mass of comet will remain same ) ⇒‌‌V1=‌