If i measure the recession velocities of 2 galaxies and galaxy a has a velocity twice that of galaxy b, how far away is b if a is 200 mpc away? (remember that v = h0 x d

If i measure the recession velocities of 2 galaxies and galaxy a has a velocity twice that of galaxy b, the far of b if a is 200 mpc away is   100 Mpc

The parsec () is a unit of length used to measure the large distances to astronomical objects outside the Solar System.

Although parsecs are used for the shorter distances within the Milky Way, multiples of parsecs are also required for the larger scales in the universe such as Kiloparsecs (kpc) is for the more distant objects within and around the Milky Way, megaparsecs (Mpc) for mid-distance galaxies, and gigaparsecs (Gpc) for many quasars and the most distant galaxies.

If i measure the recession velocities of 2 galaxies and galaxy a has a velocity twice that of galaxy b, how far away is b if a is 200 mpc away? Remember that

galaxy A:  

galaxy B:  100 Mpc

Grade:  9

Subject:  physics

Chapter:  the recession velocities

Keywords:  galaxy,  the recession velocities, velocity, mpc, measure, far away