Answer:
Approximately
.
Step-by-step explanation:
For a planet of mass
, the Schwarzschild Radius would be:
,
Where:
is the gravitational constant, and
is the speed of light in vacuum.
It is given that the mass of this planet is
. Substitute this value into the expression for
and evaluate to obtain:
.
In other words, if the radius of this planet goes below approximately
, the planet would become a black hole.