Page 186 - Revised Maths Wisdom Class - 6

184 MATHS

Chapter-7 : Perimeter and Area

Exercise – 7A
1. (a) 5 cm (b) 22 cm (c) 24 cm (d) 30 cm
2. (a) 47 cm (b) 22 cm (c) 48 cm (d) 24 cm (e) 18 cm
3. (a) 30 m (b) 54 m (c) 100 m (d) 41 cm
4. (a) 53.5 m (b) 18 m 80 cm 5. (a) 1 m (b) 3 m (c) 242 cm 6. 4a units, 8a units
7. 63.25 m 8. 104 cm 9. 8.4 km 10. Roja 11. ` 88200 12. 67 cm
13. (a) 250 cm (b) 187.5 cm (c) 150 cm (d) 125 cm (e) 75 cm 14. 12 sticks
15. length = 9 m 90 cm, breadth, = 6 m 30 cm 16. 2.8 cm 17. (3 × 3), (9 × 1), etc. many answers are possible. 12 m, 20 m
Exercise – 7B
1. (a) 13 cm 2 (b) 12 1 cm (c) 9 cm (d) 6 cm (e) 10 cm (f) 10 cm 2
2
2
2
2
2
2. (a) 200 cm (b) 71.88 cm (c) 10 cm 2 3. (a) 196 cm (b) 0.0625 m (c) 2.25 km (d) 1089 cm 2
2
2
2
2
2
2
2
2
4. (a) 1239.04 cm (b) 210 cm , Area of square is more 5. 84.5 m, 88 7. 25 m 6. ` 71,400, ` 9100
7. 6860 cm 8. 3200 tiles 9. 125 envelopes, ` 1562.50 10. 2700 sq. m 11. (a) 13.5 sq. m (b) 11 sq. m
2
REVIEW TIME
A. 1. 8 2. Area 3. 21 inches 4. 400 cm 2 5. 4 times 6. 300 cm 2
7. length = area 8. 21 cm 9. Perimeter 10. Squared sheet
breadth
B. 1. (b) 2. (a) 3. (c) 4. (c) 5. (d) 6. (a) 7. (d) 8. (a) 9. (b) 10. (b)
C. 1. l ×b 2. 7200 3. 120 m 4. 3 (breadth) 2 5. 18
D. 1. T 2. T 3. F 4. F 5. F
E. 1. a 2. c 3. c 4. a F. 1. d 2. a 3. a
G. 1. 10 m 2. Area will be doubled 3. 22500 m 2 4. 23.75 units 5. 200 m
Integrated Question
1. 44 meter 2 2. ` 3630000 3. 5 × 3 or 3 × 5
Practice Paper - 3
1. (a) 2. (c) 3. (d) 4. (b) 5. (c) 6. 6 cm 7. 4 × side 8. obtuse angle
9. line segment 10. acute 11. True 12. False 13. True 14. True 15. False 16. c
17. d 18. a 19. d 20. a 21. 72 cm 22. ` 260 23. AB, BC, AC 24. 90° 25. 33.75 m 2

26. 14 cm 27. 30 m 28. 16 cm

Chapter-8 : Playing with Contruction

Exercise – 8A
Do it yourself

REVIEW TIME

A. 1. c 2. a 3. b 4. c
B. 1. protractor 2. compass 3. Geometry kit 4. ruler 5. protractor
C. Do it yourself

Chapter-9 : Symmetry

Exercise – 9A

1. e, h and j are not symmetrical 2. (a) 5 (b) 6 (c) 5 (d) 8 (e) 12 3. (a) 2 (b) 4 (c) 5
4. (a) Yes (b) No (c) Yes (d) No (e) Yes 5. (c) 6. (a)