(A) : Time taken by the bomb to reach the ground from a moving aeroplane depends on height of aeroplane only
(R) : Horizontal component of velocity of bomb remains constant and vertical component of velocity of bomb changes due to gravity

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Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are true and (R) is not the correct explanation of (A)

(A) is true but (R) is false

Both (A) and (R) are false

answer is B.

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Detailed Solution

Since, acceleration is only in vertical direction, Horizontal component of velocity of bomb remains constant and vertical component of velocity of bomb changes due to gravity.

Time taken by the bomb to reach the ground is calculated as,

$t = \sqrt{\frac{2 h}{g}}$

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