What is his total displacement

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Q. A dolphin in seawater at a temperature of 25 °C makes a chirp. How much time passes before it hears an echo from the bottom of the ocean, 208 m below?

Q. A motorist drives north for 39 minutes at 88.5km/h and then stops for 15 minutes. He then continues north, travelling 130 km in 1.80 h.
What is his total displacement?

Reference no: EM1344899

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