Answer: 128 meters (choice C)
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Step-by-step explanation:
According to a few online sources, the speed of sound in water is approximately 1500 meters per second. The actual speed will depend on the the following factors:
- Temperature of the water
- How salty it is
- Water pressure
Despite those extra factors, we'll keep things simple and go with the 1500 m/s figure.
The round-trip time for the sound wave is 0.171 seconds. Half of which is 0.171/2 = 0.0855 seconds. This is the amount of time it takes for the sound wave to go from the boat to the bottom of the ocean.
Then,
distance = rate*time
distance = (1500 m/s)*(0.0855 seconds)
distance = 128.25 meters
When rounding to the nearest meter, we get 128 meters
128 meters = 419.948 feet approximately
For comparison purposes,
- The Spring Temple Buddha statue (located in China) is about 128 meters tall. It is the second tallest statue in the world.
- The One Wall Centre (Vancouver Canada) is a 48-story building that is 128 meters tall. If each floor was the same height, then each story is about 128/48 = 2.667 meters = 8.75 feet tall.
I found those objects when I searched out "what objects are 128 meters tall".