A bomber flying upward at an angle of 530 with the vertical releases a bomb at an altitude of 800 m. The bomb strikes the ground 20 s after its release. If g =10ms-2 , the velocity at the time of release of the bomb in ms-1 is

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400

800

100

200

answer is C.

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Detailed Solution

-h=ucoθt-12 gt2

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