Answer
We know that L=rmv
The mass of the solar system M=1,992669542.10^30kg
r=2,6.10^11m
v=250km/s=2,5.10^5m/s
Work Step by Step
We know that the mass of the solar system is the sum of the masses of the Sun, planets and moons (and negligible smaller objects)
We assume that the radius is = to the distance from the center of the galaxy to the Sun, we can see it in Appendix E
We can see the speed in Appendix E
=>L=rmv=1,295.10^47 kgm^2/s
