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Sneha Thakur
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Asked: 2020-10-29T05:29:09+00:00 In:

To warn ships for underwater rocks, a lighthouse spreads a red colored 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)

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NCERT Solutions for Class 10 Science Chapter 12
Important NCERT Questions
Areas Related To Circles Class,
NCERT Books for Session 2022-2023
CBSE Board and UP Board Others state Board
EXERCISE 12.2
Page No:231
Questions No:12

2020-2021areas related to circles classcbsechapter 12class10mathematicsncert
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    2 Answers

    1. Get Hindi Medium and English Medium NCERT Solution for Class 10 Maths to download.
      Please follow the link to visit website for first and second term exams solutions.
      https://www.tiwariacademy.com/ncert-solutions/class-10/maths/chapter-12/

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    2. Best Answer
      To warn ships for underwater rocks, a lighthouse spreads a red colored 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)

      The light house spreads red light in the form of sector of angle 80°, whose radius is 16.5 km.
      Therefore, the area of sector
      = 80°/360° × πr²
      = 2/9 × π(16.5)²
      = 2/9 × 3.14 × 16.5 × 16.5
      = 189.97 km²

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