A balloon is moving upwards with velocity \( 10 \mathrm{~ms}^{-1} \). It releases a stone which ....

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A balloon is moving upwards with velocity \( 10 \mathrm{~ms}^{-1} \). It releases a stone which comes down to
\( \mathrm{P} \)
the ground in \( 11 \mathrm{~s} \). The height of the balloon from the ground at the moment when the stone was dropped is :
(A) \( 495 \mathrm{~m} \)
(B) \( 592 \mathrm{~m} \)
(C) \( 460 \mathrm{~m} \)
(D) \( 500 \mathrm{~m} \)


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