Test Academy | A rock under water is 1595m deep. Find the time in which an ultrasonic signal returns after reflection from the rock. Given speed of ultrasonic waves in water = 1450ms⁻¹. 22 s, 2.2 s, 0.22 s, 0.2 s

Question

A rock under water is 1595m deep. Find the time in which an ultrasonic signal returns after reflection from the rock. Given speed of ultrasonic waves in water = 1450ms⁻¹.

Options :

22 s
2.2 s
0.22 s
0.2 s

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