Question

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 π = 3.14)

Answer 1

Radius, r = 16.5 km. = \(\frac{33}{2}\)km. 

Angle, θ = 80° 

Area of the Sector = ? 

Area of the sea over which the ships are warned