What is the escape velocity from a red giant with a mass of 1msun and a radius of 150 rsun?

We know:

Formula for escape velocity is:

V = √ (2GM/R)

where,

G = Universal gravitational Constant = 6.67 * 10^ (-11) Nm^2/Kg^2

M = Mass

R = Radius

So, we get, using given values:

Given:

m = 1 * mass of Sun = 1.9891*10^30 kg

R = 150 * Radius of Sun = 695500km

v = √ (2*6.67*10^ (-11) * 1.9891*10^30kg/695500000m)

so, v = 617671.632719m/s