A ship sends out ultrasound that returns from the seabed and is detected after $5 s$ . If the speed of ultrasound through seawater is $1600 m / s$ , what is the distance of the seabed from the ship?

2.5 km

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3.5 km

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4 km

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5 km

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Solution

The correct option is C
4 km

Let, the distance between ship and seabed be $d$ .

So the total distance traveled by the sound waves (ship to the seabed and then back to ship) is $2 d$ .

Therefore, $2 d = s p e e d \times t i m e = 1600 \times 5 = 8000 m$ .

$d = \frac{8000}{2} = 4000 m = 4 k m .$

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A ship sends out ultrasound that returns from the seabed and is detected after 5 s. If the speed of ultrasound through seawater is 1600 m/s, what is the distance of the seabed from the ship?

The correct option is C 4 km Let, the distance between ship and seabed be d. So the total distance traveled by the sound waves (ship to the seabed and then back to ship) is 2d. Therefore, 2d=speed×time=1600×5=8000 m. d=80002=4000 m=4 km.

A ship sends out ultrasound that returns from the seabed and is detected after $5 s$ . If the speed of ultrasound through seawater is $1600 m / s$ , what is the distance of the seabed from the ship?

The correct option is C
4 km

Let, the distance between ship and seabed be $d$ .

So the total distance traveled by the sound waves (ship to the seabed and then back to ship) is $2 d$ .

Therefore, $2 d = s p e e d \times t i m e = 1600 \times 5 = 8000 m$ .

$d = \frac{8000}{2} = 4000 m = 4 k m .$