An aeroplane is flying at a height of 19...

An aeroplane is flying at a height of 1960 m in horizontal direction with a velocity of 360 km/hr. When it is vertically above the point. A on the ground, it drops a bomb. The bomb strikes a point B on the ground, then the time taken by the bomb to reach the ground is-

`20sqrt(2)sec`

`20sec`

`10sqrt(2)` sec

10 sec

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