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

December 26, 2018 by Dattu

NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles Ex 12.2 are part of NCERT Solutions for Class 10 Maths. Here are we have given Chapter 12 Areas Related to Circles Class 10 NCERT Solutions Ex 12.2.

  • Areas Related to Circles Class 10 Ex 12.1
  • Areas Related to Circles Class 10 Ex 12.3
BoardCBSE
TextbookNCERT
ClassClass 10
SubjectMaths
ChapterChapter 12
Chapter NameAreas Related to Circles
ExerciseEx 12.2
Number of Questions Solved5
CategoryNCERT Solutions

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

NCERT Solutions for Class 10 Maths

Page No: 230

Unless stated otherwise, use π =22/7.

Question 1.
Find the area of a sector of a circle with radius 6 cm if angle of the sector is 60°.

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 1s

Question 2.
Find the area of a quadrant of a circle whose circumference is 22 cm.

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 2s

Question 3.
The length of the minute hand of a clock is 14 cm. Find the area swept by the minute hand in 5 minutes.

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 3s

Question 4.
A chord of a circle of radius 10 cm subtends a right angle at the centre. Find the area of the corresponding : (i) minor segment (ii) major sector. (Use π = 3.14)

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 4s

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 formed by the corresponding chord

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 5s
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 5s1

Question 6.
A chord of a circle of radius 15 cm subtends an angle of 60° at the centre. Find the areas of the corresponding minor and major segments of the circle. (Use π = 3.14 and √3 = 1.73)

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 6s
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 6s1

Question 7.
A chord of a circle of radius 12 cm subtends an angle of 120° at the centre. Find the area of the corresponding segment of the circle. (Use π = 3.14 and √3 = 1.73)

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 7s
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 7s1

Question 8.
A horse is tied to a peg at one corner of a square shaped grass field of side 15 m by means of a 5 m
long rope (see Fig. 12.11). Find
(i) the area of that part of the field in which the horse can graze.
(ii) the increase in the grazing area if the rope were 10 m long instead of 5 m. (Use π = 3.14)

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 8s
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 8s1

Question 9.
A brooch is made with silver wire in the form of a circle with diameter 35 mm. The wire is also used in making 5 diameters which divide the circle into 10 equal sectors as shown in Fig. 12.12. Find:
(i) the total length of the silver wire required.
(ii) the area of each sector of the brooch.

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 9s

Question 10.
An umbrella has 8 ribs which are equally spaced (see Fig. 12.13). Assuming umbrella to be a flat circle of radius 45 cm, find the area between the two consecutive ribs of the umbrella.

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 10s

Question 11.
A car has two wipers which do not overlap. Each wiper has a blade of length 25 cm sweeping through an angle of 115°. Find the total area cleaned at each sweep of the blades.

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 11s

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 are warned.
(Use π = 3.14)

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 12s

Question 13.
A round table cover has six equal designs as shown in Fig. 12.14. If the radius of the cover is 28 cm, find the cost of making the designs at the rate of ₹ 0.35 per cm2 . (Use √3 = 1.7)

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 13s
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 13s1

Question 14.
Tick the correct answer in the following :
Area of a sector of angle p (in degrees) of a circle with radius R is
(A) p/180 × 2πR             (B) p/180 × π R2                (C) p/360 × 2πR           (D) p/720 × 2πR2

Solution:
NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles ex 12.2 14s

 

We hope the NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles Ex 12.2 help you. If you have any query regarding NCERT Solutions for Class 10 Maths Chapter 12 Areas Related to Circles Ex 12.2, drop a comment below and we will get back to you at the earliest.

Filed Under: CBSE Tagged With: NCERT Solutions for Class 10 Maths

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