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Quick Check Practice Time 13C
Breadth of rectangular field = 45 m 1. (a) Diameter = 8 cm, Circumference = 25.14 cm, Area = 50.29 cm 2
Think and Answer (b) Radius = 7 cm, Circumference = 44 cm, Area = 154 cm 2
`6600 (c) Radius = 22.9 cm, Diameter = 45.8 cm, Area = 1648.15 cm
2
Quick Check (d) Radius = 14 m, Diameter = 28 m, Circumference = 88 m
Area of triangle = 16 cm 2 2. (a) Circumference = 44 cm, Area = 154 cm 2
Practice Time 13A (b) Circumference = 22 cm, Area = 38.5 cm 2 2
1. (a) Perimeter = 52 cm, Area = 153 cm 2 (c) Circumference = 352 mm, Area = 9856 mm
(d) Circumference = 8.8 m, Area = 6.16 m
2
(b) Perimeter = 32 m, Area = 61.75 m 2 3. Circumference = 176 cm, Area = 2464 cm 2
(c) Perimeter = 43.4 cm, Area = 114.3 cm 2 4. 2
(d) Perimeter = 4220 m, Area = 915000 m 2 Area of circle = 346.5 cm
2. (a) Perimeter = 38 cm, Area = 90.25 cm 2 5. Circumference = 36 cm, Area = 77 cm 2
(b) Perimeter = 100 cm, Area = 625 cm 2 6. 7000 Revolutions 7. Ratio of circumferences is 7 : 9
(c) Perimeter = 46 mm, Area = 132.25 mm 2 8. Circumference = 52.8 cm, 221.76 cm 2
(d) Perimeter = 0.24 m, Area = 0.0036 m 2 9. Width of the track = 14 m
3. Area of shaded part = 10 cm 2 10. Cost of gravelling = `2109.03
4. Area of each triangle = 48 cm 2 11. Radius of circular garden = 56 m, Width of the path = 7 m
5. Area of each triangle = 12.5 cm 2 Maths Connect
6. Width = 20 cm, Perimeter of rectangular sheet = 90 cm 2
7. Breadth = 20 m, Perimeter = 84 m (a) 672.69 m (b) 293.2 m
8. Breadth = 15 cm, Area = 525 cm 2 Brain Sizzlers
9. Breadth = 8 cm, Square encloses more area Perimeter of circle
10. Length of rectangle = 64 cm, Perimeter of rectangle = 178 cm Chapter Assessment
11. Square plot of land has the greater area than the rectangular plot of land
by 36 cm 2 A. 1. (a) 2. (c) 3. (a) 4. (a)
12. Cost of white washing the wall = `280. 5. (a) 6. (a) 7. (b)
13. Area of two paths = 136 m 2 B. 1. (c) 2. (a) 3. (d) 4. (b)
2
14. Area of the path = 3584 m , Cost of cementing = `62,720 C. 1. 5 2. 12 cm 3. Remains unchanged
15. Area of the path = 1176 m 2 4. Four times 5. 22 cm 6. pr + 2r
Quick Check D. 1. 17 m 2 2 2 2
33 cm , 70 cm , 12 cm 2 2. (a) 616 cm (b) 56 cm (c) 33 cm (d) 149.19 cm
2
2
(e) 2085.71 cm (f) 1000 cm 2
2
Think and Answer 3. Base = 18 m and height = 24 m 4. Altitude = 1.4 m
Area will be doubled. 5. (a) QM = 19.5 cm (b) SR = 18 cm 6. `12,150
Practice Time 13B 7. 4.9 cm 8. 94.2 cm 9. 2379.5 cm 2
1. (a) Area of parallelogram = 48 cm 2 10. 24,11,520 km 11. `4,10,400
(b) Height of parallelogram = 3 cm 12. (a) 256 cm 2 (b) 64 cm (c) 128 cm 2
(c) Base of parallelogram = 6.4 cm
(d) Height of parallelogram = 2.1 m Chapter 14: Data Handling
2. (a) Height of triangle = 17.1 cm Let’s Recall
(b) Base of triangle = 15.5 cm 1.
(c) Area of triangle = 8 cm Raw Data 2. 8 3. 24 4. 13 5. 55 kg
2
3. (a) 28 cm 2 (b) 15 cm 2 (c) 8.75 cm 2 (d) 24 cm 2 6. Weight (kg) 35 42 45 47 48 55 60 68
4. (a) 20 cm 2 (b) 12 cm 2 (c) 20.25 cm 2 (d) 16 cm 2 Frequency 2 3 1 8 1 9 4 2
5. Area of rectangle ABCD = 330 cm 2
Area of DADC = Area of DBAC = 165 cm 2 Quick Check
6. Area of triangle = 37.5 cm 2 1. 4 3. 5.6 4. –3
7. Area of parallelogram = 117 cm 2 Quick Check
8. Base of parallelogram = 0.13 cm 2. Mean marks = 30.42
9. Base = 8 cm, height = 40 cm Mode = 35; Mode is greater.
10. 11 cm 11. Base = 19.2 m, Height = 16 m
12. Area = 330 cm , length of side SR = 27.5 cm, perimeter = 85 cm Practice Time 14A
2
13. Area of DABC = 30 cm 2 1. (a) 10 (b) 19 (c) 7.4
Length of AD = 4.6 cm 2. (a) 3 (b) 17 (c) 14
14. Area of DXYZ = 36 cm 2 3. (a) 10 (b) 2.5 (c) 4
Height ZN = 8 cm 4. 5 5. 12.9 6. 4.5 7. 75 8. 5 9. 19
15. Cost of fencing = `13,800 10. 49.67 11. 100.125 12. 85 13. 18
Think and Answer 14. Mean = 155 cm, No mode, median = 155 cm
Perimeter has increased by 32 cm. Practice Time 14B
Quick Check 1. (a) 32 (b) Grapes (c) 18
1. Area of circle = 50.28 sq. inches 2. (a) February, 56 (b) March, 30 (c) 36
2. Radius of circle = 7 cm 4. (a) 2019 (b) 2016 (c) 100
3. Area of the plate = 201.14 cm 2 6. (b) Monday (c) 333.33
Think and Answer Brain Sizzlers
Horse can not graze area 144.86 m 2 55 minutes 42 seconds

367 Answers