To warn ships for underwater rocks, a lighthouse spreads a red coloured light

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asked Feb 7, 2018 in Mathematics by Kundan kumar (49,132 points) 34 382 1020
To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle 80º to a distance of 16.5 km. Find the area of the sea over which the ships are warned.

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answered Feb 7, 2018 by Vikash Kumar (144,729 points) 8 11 21
 
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