How long does it stay in the air (in s)?

37

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37.1

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36

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35

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Solution

The correct option is C $37.1$
Time taken by missile to reach 1000 m height is $12.5 s$ (solved earlier)
Time taken by missile to fall on the surface after the engine falls is $24.6 s$ (solved earlier)
Thus time for which missile stays in air $t_{t o t a l} = 12.5 + 24.6 = 37.1 s$

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