Physics Circular Motion Problem?

When it orbited the Moon, the Apollo 11 spacecraft’s mass was 10300 kg, its period was 133 min, and its mean distance from the Moon’s center was 1.99345 × 106 m. Assume its orbit was circular and the Moon to be a uniform sphere of mass 7.36 × 1022 kg. Given the gravitational constant G is 6.67259 × 10−11 N m2 /kg2 , calculate the orbital speed of the spacecraft. Answer in units of m/s.
Answers

Andrew Smith

Clearly both G and the mass of the moon are "red herrings" Speed = distance / time = 2*pi() * R / T = 2 * pi() * 1.99345* 10 ^ 6 / 133 = 94 km /min or 94 * 60 km / hr or 94/60 km/ s = 1.57 * 10 ^ 3 m/s