AAI ATC Junior Executive 26 Dec 2015 Shift 2 Paper

In a desert, a beetle's motion sends fast longitudinal pulses, v_L = 150 ms^-1, and slower transverse pulses, v_S = 50 ms^-1, along the sand's surface. The sand scorpion has eight legs; spread roughly in a circle of 5 cm diameter, intercepts the faster longitudinal pulses 4.0 ms earlier than the slower transverse pulse. The pray is located at a distance of: