Answer:
144.03 km
Step-by-step explanation:
The diagram explains better.
From the diagram:
AB = distance between transmitters A and B
AC = distance between transmitter A and the ship
BC = distance between transmitter B and the ship
Using SOHCAHTOA:
tan(A) = BC/AB
AB = 90 km
A = 58°
=>BC = 90 * tan(58)
BC = 144.03 km
The distance between transmitter B and the ship is 144.03 km