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2014-08-26T19:58:12+05:30

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10400m 
using 
s_{y} = usin \alpha t + (1/2)gt^{2}
10400 = 1/2 x 10 x t²
t= √(2080)

10400 =  1/2 x 9.8 x t²

t = 46.046 seconds
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error in your answer correct that...
2014-08-27T03:10:00+05:30

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
The time duration to reach the surface of water is dependent on the height above water surface and not on the speed of the flight.

S = 1/g t²       =>   10,400 =  1/2 *9.81 * t²

t = 46.046 seconds

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