Echo Return Time from Canyon Wall

Calculating Echo Delay

Distance to wall: 4,300 ft (round trip = 8,600 ft)
Speed of sound: ~1,125 ft/sec (room temp)

Time = 2 × Distance / Speed = 8,600 / 1,125 ≈ 7.64 seconds

Correction: The earlier calculation used 2 × 8,600, but round-trip distance is already 8,600 ft. So time = 8,600 / 1,125 = 7.64 seconds.

Therefore, the echo returns in about 7.6 seconds.