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

# 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)

Share

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/

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