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प्रश्न
On sending an ultrasonic wave from a ship towards the bottom of a sea, the time interval between sending the wave and receiving it back is found to be 1.5 s. If the velocity of wave in sea water is 1400 m s-1, find the depth of the sea.
संख्यात्मक
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उत्तर
t = 1.5 s,
V = 1400 m/s,
d = ?
V = `(2d)/t`
or d = `(V xx t)/2`
d = `(1400 xx 1.5)/2`
= 1050 m
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