Given equation of hyperbola is

Given hyperbola is the horizontal hyperbola
The standard form of the horizontal hyperbola is

When we compare these two equations, we get
h = 1, a = 5 , k = -3 and b = 3
Length of the transverse axis = 2a
Plug in the value of 'a' as 5
So,Length of the transverse axis = 2(5) = 10