A basketball of mass m = 0.42 kg and radius r=0.36 m is released from the top of a round valley with a radius R = 0.2 km

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A basketball of mass m = 0.42 kg and radius r=0.36 m is releasedfrom the top of a round valley with a radius R = 0.2 km. What isthe velocity of the basketball when it reaches the bottom of thevalley? Consider that the basketball rolls without friction andg=9.80 m/s2
a. 48.5 m/s
b. 49.2 m/s
c. 53.2 m/s
d. 64.2 m/s