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Chapter 10: Percentage and its Applications Practice Time 10C
Let’s Recall 1. Cost Price Selling Price Profit / Loss Profit % /
1. (a) 3 : 20 (b) 3 : 50 (c) 5 : 6 (d) 1 : 12 (C.P.) (S.P.) Loss %
(e) 3 : 5 (f) 6000 : 107 (a) `190 `235 Profit = `45 23.68%
2. Income : `19200, expenditure: `7200 (b) `120 `100 Loss = `20 16.67%
3. (a) 5 : 11 (b) 1 : 1 (c) 1 : 2 (c) `1800 `1640 Loss = `160 8.89%
Think and Answer (d) `4000 `3600 Loss = `400 10%
44% (e) `9600 `10000 Profit = `400 4.17%
2
Quick Check 2. Profit of 6 % 3. `352, 20.77% 4. 3.44% 5. `90.48
40%, 60% 6. `3120 3 7. `15, 12 % 8. Profit % = 15%
Quick Check 9. `1600 10. Profit % = 33.33%
60% Quick Check
Think and Answer `28125
Think and Answer
157 9 years
125 Practice Time 10D
Practice Time 10A
1. (a) 45% (b) 53.33% (c) 14.5% (d) 175% (e) 1240% 1. Sr. No. (a) (b) (c) (d)
Principal (`) 4800 12500 7550 4800
21 7 7 17 33
2. (a) (b) (c) (d) (e) Time 2 years 4 months 3 years 73 days
25 5 100000 300 800
Annual rate of
3. (a) 698% (b) 42% (c) 167% (d) 0.3% (e) 2390% Interest (%) 15 6 8 15
4. (a) 0.27 (b) 1.48 (c) 0.0254 (d) 0.0007 (e) 0.062 Simple interest (`) 1440 250 1812 144
5. (a) 34.29% (b) 77% (c) 74.36% (d) 225% (e) 186.67%
6. (a) 57 : 100 (b) 5 : 4 (c) 6 : 125 (d) 19 : 10000 Amount (`) 6240 12750 9362 4944
(e) 1 : 12500 2. `3007.20 3. 15 years 4. 11.5% p.a. 5. `2700
Quick Check 6. 1 year 4 months 7. `750, 10% p.a.
1. 65% 2. 16% 3. 55% 4. 100% Maths Connect
Asia - 4,45,28,685 sq. km, India - 31,17,008 Sq. km.
Think and Answer Chapter Assessment
30% A. 1. (d) 2. (b) 3. (c) 4. (c) 5. (c) 6. (b)
Think and Answer B. 1. (b) 2. (a) 3. (a) 4. (d) 5. (a)
50% C. (a) - (iii) (b) - (i) (c) - (v) (d) - (vi) (e) - (iv) (f) - (ii)
Think and Answer D. 1. 8 2. 21 3. Cost price 4. 101.25
5.
9 Principal 2
Quick Check E. 1. 220 2. 83% 3. 20% 4. 16 % 5. Profit of 10%
3
1. 70 2. 500 kg 6. 2 years 6 months 7. `8500 8. 16.67% 9. `960
Think and Answer 10. 200 11. 25%
1. 1280 2. 20 12. Raman paid `960 more then Aman.
13. `5250
14. `75,000 15. Manager 40, Employees 200
Think and Answer 16. (a) 0.54% (b) 34.19% (c) 65.71%
Sunil - `750, 25%, Anil - `1000, 33.33% Raj - 1250, 41.67% Brain Sizzlers
Practice Time 10B `1000
1. (a) 94.5 (b) 6.46 (c) 52.9 m (d) 12 kg Chapter 11: Symmetry
(e) 4.75 L Let’s Recall
2. (a) `333.33 (b) 800 kg (c) 5000 km (d) 1818.18 L 1. 1, Horizontal 2. 1, Vertical 3. 1, Vertical
(e) 125 hr 4. 2, Both Horizontal and Vertical 5. 1, Vertical
3. (a) 22.5% (b) 4% (c) 0.86% (d) 75% Quick Check
(e) 90% (a) 8 (b) 4 (c) 6 (d) 1
4. (a) 16.67 (b) 145.92 (c) 5000 (d) 73.12 Practice Time 11A
(e) 750
5. 0.14% 6. 500
7. A = 38.46% B = 61.54% 1. (a) (b)
8. 38.89%, 27.78%, 33.33%
9. Radha `1600,33.33%, Meera `1200,25%, Reena `2000, 41.67%
10. (a) 93.6 (b) 132 11. 1.14 12. `19934
13. 506 14. 300 15. 8%
Think and Answer (c) (d)
Cost price provides a consistent baseline for measuring the gain or
loss on a product; `550.

363 Answers