NCERT Solution for Class 10 Mathematics Chapter 12 - Areas Related to Circles RR ACADEY MEERUT MATHS BY RAKESH CHATURVEDI SIR

NCERT Solution for Class 10 Mathematics Chapter 12 - Areas Related to Circles Page/Excercise 12.1

Question 1

Solution 1

Question 2

Unless stated otherwise, use 

The radii of two circles are 8 cm and 6 cm respectively. Find the radius of the circle having area equal to the sum of the areas of the two circles. 

Solution 2

Question 3

Solution 3

Question 4

Solution 4

Question 5

Solution 5

Let radius of circle be r

          Circumference of circle = 2pr

          Area of circle = pr2

Given that circumference of circle and area of circle is equal.

So, 2pr = pr2

2 = r

So radius of circle will be 2 units

NCERT Solution for Class 10 Mathematics Chapter 12 - Areas Related to Circles Page/Excercise 12.2

Question 1

Solution 1

Question 2

Solution 2

Question 3

Solution 3

Question 4

Solution 4

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 5

  

Question 6

Solution 6

 

Question 7

Solution 7

  

Question 8

Solution 8

Question 9

Solution 9

Question 10

Solution 10

Question 11

Solution 11

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 12

Question 13

Solution 13

Question 14

Solution 14

NCERT Solution for Class 10 Mathematics Chapter 12 - Areas Related to Circles Page/Excercise 12.3

Question 1

Solution 1

Question 2

Solution 2

Question 3

Solution 3

Question 4

Solution 4

Question 5

Solution 5

Question 6

Solution 6

Question 7

Solution 7

Question 8

Solution 8

Question 9

Solution 9

Question 10

Solution 10

Question 11

Solution 11

Question 12

Solution 12

Question 13

Solution 13

Question 14

Solution 14

Question 15

Solution 15

Question 16

Solution 16