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[" 31.A ship which is stationary,is at a...

[" 31.A ship which is stationary,is at a distance "],[" of "2900m" from the seabed.The ship "],[" sends an ultrasound signal to the seabed "],[" and its echo is heard after "4" second.The "],[" speed of sound in water is : "],[[" (A) "340m/s,1450m/s],[" (B) "," (C) "2900m/s],[" (D) "775m/s]]

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