NCERT Class 10 Maths Solutions Chapter - 12 Areas Related to Circles, Ex -12.2

Ex - 12.2

Question 1.


Solution



Question 2.  

Solution



Question 3.


Solution



Question 4.


Solution



Question 5.  In a circle of radius 21 cm, an arc subtends an angle of 60 ° at the centre.      Find:(i)       The length of the arc
(ii)      Area of the sector formed by the arc
(iii)     Area of the segment forced by the corresponding chord

Solution





Question 6.


Solution





Question 7.


Solution





Question 8.


Solution



Question 9.

Solution


Question 10.


Solution


Question 11.


Solution


Question 12.  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 warned. (Use  = 3.14)

Solution



Question 13.  

Solution




Question 14.


Solution

Ex-12.3