A man moves in an open field such that after moving \( 10 \mathrm{~...

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A man moves in an open field such that after moving \( 10 \mathrm{~m} \) in a straight line, he makes a sharp turn of \( 60^{\circ} \) to his left. Find the net displacement of the man after 7 such turns.
\( \mathrm{P} \)
(A) \( 10 \mathrm{~m} \)
(B) \( 20 \mathrm{~m} \)
(C) \( 70 \mathrm{~m} \)
(D) \( 30 \mathrm{~m} \)
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