12TH•Physics•Space And Environment•Question 8
Solution
A galaxy is receding from the Earth at a speed of $2.1 \times 10^{7}\,\mathrm{m\,s^{-1}}$. Using a Hubble constant of $70\,\mathrm{km\,s^{-1}}/\mathrm{Mpc}$, find the distance to the galaxy.
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