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in Mathematics by (25.0k points)
समुद्र के किनारे स्थित किसी पहाड़ी से देखने पर एक नाव का, जो पहाड़ी की ओर जा रही है । अवनमन कोण `30^(@)` का है । 4 मिनट बाद उसका अवनमन कोण `60^(@)` हो जाता है । उसे किनारे तक पहुँचने में कोण लगा समय होगा :
A. 3 मिनट
B. 2 मिनट
C. 12 मिनट
D. 8 मिनट

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