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.

Explanation

To find the area of the sea over which ships are warned by the lighthouse, we can use the formula for the area of a sector of a circle. The formula is:

\[ \text{Area} = \frac{\theta}{360} \times \pi r^2 \]

where:
- \(\theta\) is the angle of the sector in degrees,
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