A research team sends a sonar signal to confirm the depth of a sea. they heard an echo after $6 s$ . Find the depth of the sea. If the speed of ultrasound in seawater is $1500 m / s$ ?

4.5 k m

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45 k m

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450 k m

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4500 k m

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Solution

The correct option is A $4.5 k m$
We know,
$2 d = v \times t; d = ? v = 1500 m / s t = 6 s$
Then,
$2 \times d = 1500 \times 6$
$⟹ d = 4500 m = 4.5 k m$

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A research team sends a sonar signal to confirm the depth of a sea. they heard an echo after 6 s. Find the depth of the sea. If the speed of ultrasound in seawater is 1500m/s?

The correct option is A 4.5 kmWe know, 2d=v×t;d=?v=1500 m/st=6 sThen,2×d=1500×6⟹d=4500 m=4.5 km

A research team sends a sonar signal to confirm the depth of a sea. they heard an echo after $6 s$ . Find the depth of the sea. If the speed of ultrasound in seawater is $1500 m / s$ ?

The correct option is A $4.5 k m$
We know,
$2 d = v \times t; d = ? v = 1500 m / s t = 6 s$
Then,
$2 \times d = 1500 \times 6$
$⟹ d = 4500 m = 4.5 k m$