What are the units of `K (1)/(4pi in_(0))` ?

What are the units of K = 1/(4 pi epsilon_0) ?

What are the unit of (mu_(0))/(4pi)

What is the value of (1)/(4pi epsilon_(0)) in SI unit?

In a regular hexagon each corner is at a distance .r. from the centre. Identical charges of magnitude .Q. are placed at 5 corners. The field at the centre is (K = (1)/(4pi in_(0)))

Six point charge each of the magnitude Q are placed at the vertices of a regular hexagon of side a as shown in the figure Electric field intensity on the line passing through the centre o and perpendicular to the plane of the figure at a large distance x (gt gt a) from o is (" Let " .(1)/(4pi in_(0) ) = k)

What is the value of 1/4pi epsilon_0 ?