Please help me solve this.

Question

Two radio stations are located 150 miles apart, where station A is west of station B. Radio signals are being transmitted simultaneously by both stations, travelling at a rate of 0.2 miles per second. A plane is travell at 60 miles above ground level just passed by station B and is headed towards the other station. If the signal from B arrives at the plane 480sl seconds before the signal sent from A. Determine the location of the plane.

Answer 1

d+(d-480sec*.2mps)=150miles

d+(d-96)=150

2d=246

ad=123miles

bd=27miles