To warn ships for underwater rocks

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To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle 80 degree to a distance of 16.5 km. Find the area of the sea over which the ships are warned. (Use π=3.14)
06
Oct
To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle 80 degree to a distance of 16.5 km. Find the area of the sea over which the ships are warned. (Use π=3.14) a lighthouse spreads a red coloured light over a sector of angle 80 degree to [...]
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