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\\November 23, 2023 5:09 PM Surender Prajapati Proof 5 Reader _________________________ Date: ___________________74

Practice Time 9B Mental Maths
1. (a) 540 seconds (b) 774 seconds (c) 12316 seconds Cost Price (`) Selling Price (`) Profit/Loss Amount (`)
(d) 840 minutes (e) 594 minutes (f) 168 hours
(g) 211 hours (h) 52 days (i) 1095 days 1. `1354 `1005 Loss `349
(j) 120 months (k) 70 months 2. `21350 `23350 Profit `2000
2. (a) 21 minutes 58 seconds (b) 52 minutes 45 seconds
3. (a) 3 hours 58 minutes (b) 8 hours 18 minutes 3. `7224 `6724 Loss `500
(c) 17 hours 12 minutes (d) 50 hours 24 minutes 4. `9702 `10542 Profit `840
4. (a) 2 days 9 hours (b) 22 days 9 hours (c) 39 days 17 hours
(d) 75 days 10 hours Brain Sizzlers
5. (a) 47 weeks 1 day (b) 62 weeks 4 day `4.50/egg
Practice Time 9C Chapter Assessment
1. (a) –(ii) (b) –(i)
2. (a) 15 min 44 s (b) 15 h 58 min (c) 6 days 8 hours 1. (a) –(iii) (b) –(ii) (c) –(ii)
(d) 10 weeks 3 days (e) 8 years 11 months 2. [(Perfume, purse, earrings) or (purse, sunglasses, earrings) (answer may
3. (a) 9 min 12 s (b) 3 min 7 s (c) 15 h 20 min (d) 2 days 8 h
(e) 1 week 5 days (f) 4 years 3 months vary)]
4. (a) 12:15 a.m. (b) 2:10 a.m. 5. (a) 9:30 a.m. (b) 7:55 a.m. 3. Loss of `18 4. `25 5. `14500 6. `499 7. `32,500, `75000
6. 7 hours 45 minutes 8. `23250 9. `450 10. `830 11. Profit of `120
7. (a) 5 hours 45 minutes (b) 8 hours 30 minutes
(c) 14 hours 15 minutes (d) 67 hours 50 minutes Chapter 11: Perimeter, Area and Volume
(e) 28 years 7 months
Practice Time 9D Let’s Recall
1. (a) 111 minutes 36 seconds or 1 hour 51 minutes 36 seconds 1. (a) 48 cm (b) 14.4 cm (c) 12.4 cm
(b) 18 hours 15 minutes (c) 48 hours 19 minutes 48 seconds 2. (a) 12 sq. units (b) 8 sq. units (c) 4 sq. units
(d) 57 hours 28 minutes 24 seconds
(e) 8 weeks 1 day (f) 21 weeks 3 days 20 hours Practice Time 11A
2. (a) 5 minutes 16 seconds (b) 4 hours 8 minutes 1. (a) 26 cm (b) 160 cm (c) 11.4 m (d) 2140 cm or 21.40 m
(c) 4 hours 9 minutes 6 seconds
(d) 13 hours 57 minutes 30 seconds (e) 9 months 19 days 2. (a) 24 cm (b) 28.8 cm (c) 36 m (d) 34 m
3. 8 min 59 seconds 3. (a) 15 cm (b) 14 cm (c) 18 cm (d) 42 cm
Practice Time 9E 4. (a) 18 cm (b) 14.4 cm (c) 21 cm (d) 28.8 cm
1. (a) –(iii) (b) –(ii) Length Breadth Perimeter of the Rectangle
2. (a) temperature (b) 100, 212 (c) 37, 98.6 5. (a)
3. (a) 8°C (b) 72°C (c) 57°F (i) 4 cm 7 cm 22 cm
4. (a) 77°F (b) 118.4°F (c) 167° F (d) 208.4°F (e) 122°F
5. (a) 20° C (b) 45°C (c) 55°C (d) 100°C (e) 123.56°C (ii) 4.8 cm 3.2 cm 16 cm
6. 87.8°F (iii) 7 cm 5 cm 24 cm
Mental Maths
1. (b) 2. (a) 3. (c) 4. (d) (iv) 18 cm 12 cm 60 cm
Chapter Assessment 1 1
1. (a) –(iv) (b) –(ii) (c) –(iv) (d) –(iii) (v) 9 cm 5 cm 30 cm
2
2
2. 21 hours 15 minutes 3. 8 years 3 months 29 days
4. 39 days 5. Sophia, 7 years 10 months and 25 days (vi) 5.5 cm 5 cm 21 cm
6. 7 minutes 7. 77.2°F 8. 68°F 9. 39.22°C 10. 14.4 minutes
Brain Sizzlers (b) Side of a Square Perimeter of the Square
Third watch
(i) 5 cm 20 cm
Chapter 10: Money (ii) 12.5 cm 50 cm
Let’s Recall (iii) 10 cm 40 cm
1. (a) `153.33 (b) `344.34 (c) `11555.2 (d) `199.99
2. `11450 1
Practice Time 10A (iv) 7 cm 30 cm
2
1. (a) `9 (b) `18 (c) `27
2. `520 3. `32, `60 4. `105 5. `500 (v) 22.5 m 90 m
6. `162 7. `1800 8. `25,20,000 (vi) 4.9 m 19.6 m
Think and Answer
No profit, No loss 6. 55.6 cm 7. 26.7 cm 8. 15.3 cm 9. 66 m 10. 20.8 cm
Practice Time 10B 11. 1632 m or 1.632 km 12. 77 m, ₹ 8624
1. (a) –(i) (b) –(iv) (c) –(i) (d) –(iii) Practice Time 11B
2. (a) Profit of `9.50 (b) Loss of `8.75 (c) Profit of `317 1.
(d) Loss of `13.75 3. `175 4. Gain of `64250 (a) 240 sq. cm (b) 115 sq. cm (c) 10560 sq.cm
5. Selling Price Profit Loss Cost Price 2. (d) 81000 sq. cm or 8.1 sq. m (c) 72.25 sq. m (d) 38.44 sq. cm
(a) 17.64 sq. cm (b) 4096 sq. cm
(a) `195 – `18 `213 Length of the Breadth of the Area (sq. cm)
(b) `977 `83 – `894 3. Rectangle (cm) Rectangle (cm)
(c) `2980 `105 – `2875
(d) `8298.25 – `1150.75 `9449 (i) 9 4.5 40.5
(e) `4368 `1486 – `2882 (ii) 50 32 1600
(f) ₹17672 – `1328 `19000 (iii) 23 15 345
6. Profit of `360 7. `2780 (iv) 8.5 6 51

270 Mathematics-5