Can a Single Galaxy Estimate Provide an Accurate H0 Value?

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b_o3
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can anyone help me out with this:

Assuming that our milky way is falling into this cluster with a velocity of 310 km/s due to gravitational attraction , estimate a value for H0 (in km s^ -1 Mpc^-1) using this single galaxy.
 

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What is your attempt? Do you know Hubble's law?