Question

An oceanic vessel surveys the ocean floor using ultrasonic waves. The ocean beneath the boat is 4600 meters deep. If the ultrasonic wave travels to the bottom of the ocean and back to the boat in 6 seconds, what is its average speed?
A) 770 m/s
B) 1530 m/s
C) 7700 m/s
D) 27600 m/s

Answer 1

The answer is C. 7700

Answer 2

B) 1530 m/s

First, you must double the distance since the wave is traveling to the ocean floor and back to the vessel. The distance is 4600 meters x 2 or 9200 meters. Next, use the speed formula to solve for average speed: v = d/t. 9200m/6s = 1530 m/s.