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To warn ships for under water rocks,a light house spreads a red coloured light over a sector of angle 80°to a distance of 16.5km. Find the area of the sea over the ships are warned. (Use π=3.14)

Posted by Tejasvini S 5 years, 3 months ago

CBSE > Class 10 > Mathematics

2 answers

Tejasvini S 5 years, 3 months ago

Thank you ?

2Thank You

Yogita Ingle 5 years, 3 months ago

When a lighthouse spreads a red-colored light underwater, it forms a sector of angle 80o and radius =16.5km

∴ Area of sector =θ/360 ×π×r²
∴ Area of sector =80/360×3.14×16.5×16.5
=189.97km²

2Thank You

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