Page 222 - Maths Class 05

Chapter-10 Perimeter and Area
Practice 10.1
1. a. 130 cm b. 17.6 cm c. 6 m d. 56 m 2. a. 880 m b. 12 cm c. 36.84 cm d. 44 cm
e. 80 cm f. 12.8 m g. 164 m h. 22.4 cm i. 72 cm j. 24.8 m
3. a. 30 cm b. 20 cm c. 104 ft d. 15 cm e. 20 cm
4. a. 75 m b. 480 cm c. 75 cm d. 290 cm e. 320 m
Practice 10.2
1. a. 54 sq. cm. b. 112 sq. cm. c. 1080 sq. cm. d. 60 sq. m. e. 288 sq. m.
2. Do it yourself. 3. a. Perimeter = 60 m b. Perimeter = 24 m
Area = 221 sq. m. Area = 35.19 sq. m.
c. Perimeter = 112 m d. Perimeter = 32 m
Area = 255 sq. m. Area = 63 sq. m. 4. Do it yourself. 5. 400 bricks
6. 20,000 block 7. 32 sq. m.
Practice 10.3
1. 60 cm 2. 12.96 sq. m. 3. 20 cm 4. 59 sq. m. 5. Do it yourself.
Sum Up
1. a. 7 sq. units b. 75 sq. units c. 7.5 sq. units d. 6 sq. units 2. a. Perimeter = 64 cm
Area = 256 sq. cm.
b. Perimeter = 40 cm c. Perimeter = 40 cm d. Perimeter = 46 cm
Area = 96 sq. cm. Area = 100 sq. cm. Area = 126 sq. cm.
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3. 7 cm 4. 290 sq. ft 5. a. 160 cm 2 b. 140 km 2 c. 39 mm 2 d. 125 m 2 e. 1500 mm
Chapter-11 Volume and Nets
Practice 11.1
1. a. 96 cu. cm b. 72 cu. cm c. 240 cu. cm 2. a. 360 cu. m b. 6912 cu. cm
c. 11840 cu. cm d. 128 cu. cm e. 36750 cu. m 3. a. 1650 cu. cm b. 2340 cm. cm c. 378 cu. m
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4. a. 7 m b. 2 m c. 729 cm d. 5 m
Practice 11.2
1. a. 11 cu. cm b. 11 cu. cm c. 7 cu. cm 2. a. 27 cu. cm b. 24 cu. cm c. 48 cu. cm
3. 5376 cu. cm 4. 4 cm 5. 13500 cu. cm 6. 1344 cu. cm
Sum Up
1. a. iii b. i c. iii d. iv e. i f. i g. ii
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2. a. 4. 8 cm b. 0.60 cm c. 52 cm d. 24 cm e. 9 m 3
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3. a. 125 cm b. 8000 cm c. 39.304 cm d. 216000 mm e. 729000 mm f. 238.328 m 3
4. 1000000 cubic centimetres make a cubic metre.
5. The box that measurers 10 cm by 3 cm by 2 cm has greater volume.
Chapter-12 Temperature
Practice 12
1. Table-1 : a. 3, 1.66°C b. 8, 4.44°C c. 58, 32.22°C d. 66.6, 37°C e. 78, 43.33°C
f. 88, 48.88°C g. 126, 70°C h. 168, 93.33°C
Table-2 : a. 18, 50°F b. 54, 86°F c. 72, 104°F d. 108, 140°F e. 135, 167°F
f. 144, 176°F g. 171, 203°F h. 180, 212°F
2. a. 60°F b. 30°F c. 10°F d. 90°F 3. a. 35°F b. –14°C c. 33°C d. 6°F e. 2°C f. 28°C
Chapter-13 Geometry
Looking Back
1. a. AB, c. EF, f. KL and g. MN are rays.
2. a. AB, BD,CD, AC b. PQ, QR, RS, PS, SQ c. LM, MN, NO, LO d. EF, FG, GH, HI
Practice 13.1
1. a. Point b. One, No c. Geometry d. Line e. Line f. Concurrent
2. Do it yourself. 3. a. Point b. Line segment c. Ray d. Line e. Ray f. Plane
Practice 13.2
1. a. Angle ÐABC b. Angle ÐPQR c. Angle ÐXYZ d. Angle ÐLMN 2. Do it yourself.
Arm AB, BC Arm PQ, QR Arm XY, YZ Arm LM, MN
Vertex B Vertex Q Vertex Y Vertex M

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