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A motor cyclist is trying to jump across a path as shown in figure by driving horizontally off a cliff \( A \) at a speed of \( 5 \mathrm{~ms}^{-1} \). Ignore air resistance and take \( g=10 \mathrm{~ms}^{-2} \). The speed with which he touches peak \( B \) is
(1) \( 20 \mathrm{~m} \mathrm{~s}^{-1} \)
(2) 12
\( \mathrm{m} \mathrm{s}^{-1} \)
(3) \( 25 \mathrm{~m} \mathrm{~s}^{-1} \)
(4) \( 15 \mathrm{~ms}^{-1} \)
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