Density of Black Hole
So when I tested the sample question I got the right answer. But doing a practice one I feel like I got the wrong answer  it seems way too high:
Black hole mass  4.31 x 10^6
I calculated Rs to be = 1.27 x 10^7
Average density:
P = m/v
m = (4.31x10^6) x (1.989x10^30)
m = 8.57x10^36 km
v=4/3 x π x r^3
v= 4.3 x π x (4.127x10^7)^3
v= 8.22 x 10^21
P = (8.57x10^26) / (8.22 x 10^21)
P = 1.04 x 10^15 km m^3
Have I calculated this correctly or have I done something wrong?
When I go on to look a Roche Limit:
1400 kg m^1 = Sun's average density
r = 2.456(((1.04x10^15)/(1400))^1/3)
r = 2243.17
Which seems way too high?
