NCERT Class 7 Mathematics

ANSWERS 303

EXERCISE 9.2

1. (i)
   3
   2
   (ii)
   34
   15 (iii)

17

30 (iv)

82

99

(v)^5726 (vi)^32 (vii)^3415

2. (i)
   13
   72
   (ii)
   23
   63 (iii)

1

195 (iv)

89

88

(v)

73

9

3. (i)
   63
   8
   (ii)
   27
   10
   (iii)
   54
   55
   (iv)
   6
   35
   (v)
   6
   55
   (vi) 1


4. (i) – 6 (ii)
   3
   10
   (iii)
   4
   15 (iv)

1

6

(v)

14

13

(vi)

91

24 (vii)

15

4

EXERCISE 11.1

1. (i) 150000 m^2 (ii) Rs 1,500,000,000


2. 6400 m^2 3. 20 m 4. 15 cm; 525 cm^2 5. 40 m


3. 31cm; Square 7. 35cm; 1050 cm^2 8. Rs 284

EXERCISE 11.2

1. (a) 28 cm^2 (b) 15 cm^2 (c) 8.75 cm^2 (d) 24 cm^2 (e) 8.8 cm^2


2. (a) 6 cm^2 (b) 8 cm^2 (c) 6 cm^2 (d) 3 cm^2


3. (a) 12.3 cm (b) 10.3 cm (c) 5.8 cm (d) 1.05 cm


4. (a) 11.6 cm (b) 80 cm (c) 15.5 cm


5. (a 91.2 cm^2 (b) 11.4 cm


6. length of BM = 30cm; length of DL = 42 cm


7. Area of ΔABC = 30 cm^2 ; length of AD =
   60
   13 cm


8. Area of ΔABC = 27 cm^2 ; length of CE = 7.2 cm

EXERCISE 11.3

1. (a) 88 cm (b) 176 mm (c) 132 cm


2. (a) 616 mm^2 (b) 1886.5 m^2 (c)
   550
   7 cm

2