When a body is thrown up in a lift with a velocity u relative to the lift, the time of flight is found to be t. The acceleration with which the li

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When a body is thrown up in a lift with a velocity u relative to the lift, the time of flight is found to be t. The acceleration with which the lift is moving up is
A. (u-"gt")/(t)
B. (u+"gt")/(t)
C. (2u-"gt")/(t)
D. (u)/(t)-2g

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(2u)/(g+a)=t rArr a =(2u)/(t)-g