Answers
Answers to practice exercises
Chapter 1
Exercise 1 (page 2)
1. 19 kg
2. 16 m
3. 479 mm
4. −66
5. £565
6. −225
7. −2136
8. −36 121
9. £10 7701
10. −4
11. 1487
12. 5914
13. 189 g
14. −70872
15. $15 333
16. 89.25 cm
17. d = 64 mm, A = 136 mm, B = 10 mm
Exercise 2 (page 5)
1. (a) 468 (b) 868
2. (a) £1827 (b) £4158
3. (a) 8613 kg (b) 584 kg
4. (a) 351 mm (b) 924 mm
5. (a) 10 304 (b) −4433
6. (a) 48 m (b) 89 m
7. (a) 259 (b) 56
8. (a) 1648 (b) 1060
9. (a) 8067 (b) 3347
10. 18 kg
Exercise 3 (page 6)
1. (a) 4 (b) 24
2. (a) 12 (b) 360
3. (a) 10 (b) 350
4. (a) 90 (b) 2700
5. (a) 2 (b) 210
6. (a) 3 (b) 180
7. (a) 5 (b) 210
8. (a) 15 (b) 6300
9. (a) 14 (b) 420 420
10. (a) 14 (b) 53 900
Exercise 4 (page 8)
1. 59
2. 14
3. 88
4. 5
5. −33
6. 22
7. 68
8. 5
9. 2
10. 5
11. −1
Chapter 2
Exercise 5 (page 11)
1. 2
1
7
2. 7
2
5
3.
22
9
4.
71
8
5.
4
11
6.
3
7
,
4
9
,
1
2
,
3
5
,
5
8
7.
8
25
8.
11
15
9.
17
30
10.
9
10
11.
3
16
12.
3
16
13.
43
77
14. 1
1
15
15.
4
27
16. 8
51
52
17. 1
9
40
18. 1
16
21
19.
17
60
20.
17
20
Exercise 6 (page 13)
1.
8
35
2. 2
2
9
3.
6
11
4.
5
12
5.
3
28
6.
3
5
7. 11
8.
1
13
9. 1
1
2
10.
8
15
11. 2
2
5
12.
5
12
13. 3
3
4
14.
12
23
15. 4
16.
3
4
17.
1
9
18. 13 19. 15 20. 400 litres
21. (a) £60, P£36, Q£16
22. 2880 litres
Exercise 7 (page 14)
1. 2
1
18
2. −
1
9
3. 1
1
6
4. 4
3
4
5.
13
20
6.
7
15
7. 4
19
20
8. 2
9. 7
1
3
10.
1
15
11. 4
12. 2
17
20
DOI: 10.1016/B978-1-85617-697-2.00040-5