Page 321 - Math_Genius_V1.0_C6_Flipbook

E:\Working\Focus_Learning\Math_Genius-6\Open_Files\17_Answers\Answers
\ 07-Nov-2024 Bharat Arora Proof-8 Reader’s Sign _______________________ Date __________

Activity 2. (a) 5 sq. units (b) 4 sq. units (c) 8 sq. units
1. (a) 42 cm (b) 36 cm (c) 42 cm (d) 42 cm (e) 46 cm 3. (a) 8 sq. units (b) 7 sq. units (c) 6 sq. units
2. Yes, 4. (a) P = 4 sq. units; Q = 8 sq. units; R = 8 sq. units; S = 4 sq. units;
5 cm T = 8 sq. units; U = 16 sq. units; V = 16 sq. units
(b) Q, R, T; P, S; U, V; Yes
5 cm (c) P = 4s + 4d; Q = 8d; R = 8s + 4d; S = 4s + 4d; T = 8s + 4d;
Practice Time 6B U = 8s + 8d; V = 8s + 8d
1. (a) 16 sq. cm (b) 20 sq. cm (c) 16 sq. cm (d) 8 sq. cm P T U
1 (d) Yes, R
(e) 11 sq. cm (f) 8 sq. cm (g) 9 sq. cm (h) 12 sq. cm V
2 Q S
2. (a) Area = 12 sq. cm; Perimeter = 22 cm
(b) Area = 16 sq. cm; Perimeter = 32 cm Mental Maths
3. 28 sq. cm 1. 12500 sq. cm 2. ` 20,000 3. 15 cm
Quick Check 4. 1920 m 5. 6000 sq. m
1. 120 sq. cm. 2. 144 sq. cm. 6. (a) 5 cm (b) 16 sq. cm
Practice Time 6C Brain Sizzlers
1. 90 sq. cm 2. 3600 sq. m 3. 60 carpets 4. 25 tiles 1. 48 sq. m
5. 5000 sq. m 6. 19 sq. m 7. `22000 8. 6 sq. m Chapter Assessment
9. 110 m 10. 72 tiles 11. 16 cm A. 1. (b) 2. (c) 3. (c) 4. (a) 5. (b)
12. Area becomes four times bigger B. 1. (a) 2. (c)
13. (a) 480 tiles (b) 64 tiles C. 1. True 2. True 3. False 4. False
2. → (c) → (i)

D. 1. → (d) → (ii)
14. (a) Perimeter = 104 cm; Area = 192 sq. cm 3. → (b) → (iv) 4. → (a) → (iii)
(b) Perimeter = 48 cm; Area = 63 sq. cm E. 1. 100 slabs 2. 1400 sq. m 3. ` 10,800
Quick Check 4. 25 sheets 5. 2400 sq. m
1. 12 sq. units 2. 18 sq. units 3. 15 sq. units 6. 160 tiles 7. ` 16,800 1
1
Greatest area is of figure 2. 8. 4 2 sq. units 9. (a) 30 sq. units (b) 49 2 sq. units
Think and Answer 10. (a) 880 sq. ft (b) 43.88 m
1. Both are possible upon the placement. (c) Length = 6.1 m, Width/Height = 0.79 m
(d) Perimeter = 13.78 m; Area = 4.819 sq. m
2.
Chapter 7: Fractions
Let’s Recall
1. (b)
2. (a) 5 (b) 2 (c) 4 (d) 2
8 4 8 3
3. (c) 4. (a) 5 (b) 4 (c) 3
Practice Time 6D Quick Check 17 9 8
1. 38 sq. units 2. 1 cm × 98 cm; 2 cm × 49 cm; 7 cm × 14 cm
3. 16 cm 1
5. (a) Toilet: (6 ft × 12 ft) ⇒ Area = 72 sq. ft 7
Utility: (17 ft × 3 ft) ⇒ Area = 51 sq. ft Practice Time 7A
Small Bedroom: (17 ft × 14 ft) ⇒ Area = 238 sq. ft 1. (a) 3 (b) 3 (c) 8 (d) 7
Garden: (23 ft × 4 ft) ⇒ Area = 92 sq. ft 4 5 16 8
Parking: (17 ft × 4 ft) ⇒ Area = 68 sq. ft 2. (a) (b)
Hall: (23 ft × 14 ft + 6 ft × 5 ft) ⇒ Area = 352 sq. ft
(b) 1400 sq. ft
Create and Solve (c)
1. 2.
B C H 2 × 7 4 × 4 3 × 6 3. (a) Numerator = 5, Denominator = 9
(b) Numerator = 19, Denominator = 71
I A E 1 × 9 2 × 8 5 × 5 (c) Numerator = 99, Denominator = 101
D G F 1 × 15 1 × 16 3 × 8 (d) Numerator = 131, Denominator = 1000
4. (a) 2 notebooks (b) 4 mangoes (c) 5 toffees
Practice Time 6E 5. (a) 11 (b) 3 (c) 15 (d) 71
1. (a) 10 sq. units (b) 11 sq. units (c) 10 sq. units (d) 12 sq. units 24 8 31 100
1 17
(e) 8 sq. units 6.
2 29

319 Answers