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[" 12.To warn ships for underwater rocks...

[" 12.To warn ships for underwater rocks,a lighthouse "],[" spreads a red coloured light aver a sector of angle "],[80^(@)" to a distance of "16.5km" .Find the area of the ses "],[" over which the ships are warned.( "II" ise "T=3.14)]

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To warn ships for underwater rocks, a lighthouse spreads a red coloured light over a sector of angle 80^(@) to a distance of 16.5 km. Find the area of the sea over which the ships are warned. (Use pi = 3.14 )

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