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# Class 12-science RD SHARMA Solutions Maths Chapter 21 - Areas of Bounded Regions

## Areas of bounded regions Exercise Ex. 21.1

### Solution 7

Thus, Required area = square units

### Solution 11

9x2 + 4y2 = 36

Area of Sector OABCO =

Area of the whole figure = 4 × Ar. D OABCO

= 6p sq. units

## Areas of Bounded Regions Exercise Ex. 21.3

### Solution 23 (i)

Equation of side AB,

Equation of side BC,

Equation of side AC,

Area of required region

= Area of EABFE + Area of BFGCB - Area of AEGCA

### Solution 33

## Areas of Bounded Regions Exercise MCQ

### Solution 1

Correct option: (b)

### Solution 2

Correct option: (c)

### Solution 3

Correct option: (b)

### Solution 4

Correct option: (b)

### Solution 5

Correct option: (b)

### Solution 6

Correct option: (a)

### Solution 7

Correct option: (c)

### Solution 8

Correct option: (a)

### Solution 9

Correct option: (d)

### Solution 11

Correct option: (b)

### Solution 10

Correct option: (a)

### Solution 12

Correct option: (b)

### Solution 13

Correct option: (b)

### Solution 14

Correct option: (c)

### Solution 15

Correct option: (c)

### Solution 16

Correct option: (d)

### Solution 17

Correct options: (d)

### Solution 18

Correct option: (d)

### Solution 19

Correct option: (a)

NOTE: Options are modified.

### Solution 20

Correct option: (c)

### Solution 21

Correct option: (b)

### Solution 22

Correct option: (b)

### Solution 23

Correct option: (c)

### Solution 25

Correct option: (a)

### Solution 26

Correct option: (d)

### Solution 27

Correct option: (c)

### Solution 28

Correct option:(b)

### Solution 29

Correct option: (c)

### Solution 30

Correct option: (b)

### Solution 31

Correct option: (b)

### Solution 32

Correct option: (a)

### Solution 33

Correct option: (b)