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Chapter 4 Ratios, Rates and (b) Rate = 20 litres ; Mastery 4.3
Proportions 1 time
volume (litre) and number of 1. (a) 175 ml olive oil
Self Practice 4.1a times the water is pumped. 50 ml vinegar
= 300 ml olive oil
1. (a) 14 : 16 : 7 RM240 x ml vinegar
(b) 2 : 1 : 5 (c) Rate = 4 subjects ;
(c) 2 : 1 : 48 amount of money (RM) and (b) 7.8 mm = 11.7 mm
3 hours
t hours
(d) 2 : 3 : 4 number of subjects.
2. 12 times
2. 56 : 12 : 3 RM500
(d) Rate = ; 3. RM60
Self Practice 4.1b 10 hectares
amount of money (RM) and Self Practice
1. 36 : 48 : 90, 4.4a
0.6 : 0.8 : 1.5, area (hectare). 1. 2 : 9 : 7
2 8
: : 1 (e) Rate = 600 revolutions ; 2. 8 : 12 : 3
5 15 3 seconds
2. (a) 1 : 3 and 2 : 6 number of revolutions and Self Practice 4.4b
(b) 3 : 8, 6 : 16 and 9 : 24 time (second). 1. RM48
3. 2 : 4 : 6, 1 : 2 : 3 2. Object A 2. 63 kg
or other valid answers. 3. 30 g per 100 cm 2 3. RM200
2
Self Practice 4.1c 4. 35 g per m 4. 35 questions
5. 3 : 1 : 2
1. (a) 3 : 20 (b) 5 : 7 : 8
(c) 9 : 20 (d) 3 : 4 : 8 Mastery 4.2 Self Practice 4.4c
1. 2.7 g per cm 3 1. 58 calories
Mastery 4.1
2. (a) (i) 1 : 21; 1 : 11 2. RM49.00
1. (a) (i) 2 : 3 : 4 6 kg 7 kg
(ii) 8 : 12 : 16 (ii) 60 days ; 60 days 3. 2 cups
(iii) 4 : 9 : 16 (b) mass and time 4. USD50
(b) 2 : 3 : 4 is equivalent to Self Practice 4.4d
8 : 12 : 16. 3. (a) RM2.25 , RM4.00 ,
(c) The numbers in the ratio 250 ml 500 ml 1. 300 fish
of areas are the squares of RM7.50 2. (a) 12 times
the numbers in the ratio of 1000 ml (b) 4 : 3
(b) RM8.00 (c) 15 times
lengths.
2. 25 : 1 (c) 1 l carton of milk. It has
the lowest price compared Mastery 4.4
3. (a) 1 Amanah and 1 Cekap to 250 ml carton of milk
(b) 16 : 20 : 12 and 500 ml carton of milk 1. 8 teachers
(c) 12 : 7 2. 3 : 4 : 7
priced at RM9 per litre and
4. 3. Hardtail scad and one finlet
as as as as RM8 per litre respectively. scad or hardtail scad and Indian
2:10 12:27:6 1:2 12:2 3:12:5 mackerel
or other valid answers. Self Practice 4.3a
Pomfret: RM15/kg
5. (a) 5 : 9 is equivalent to 15 : 27 RM5 RM20
1. (a) = Hardtail scad: RM6.40/kg
(b) 5 : 12 is equivalent to 10 : 24 3 12 One finlet scad: RM9.00/kg
and 15 : 36 (b) 24 cm = 78 cm Indian mackerel: RM13.50/kg
6. 6 : 4 : 2, 18 : 12 : 6 4 13 4. (a) Bacteria A, 40 million per
or other valid answers. (c) 13 boys = 65 boys minute
15 girls 75 girls
Self Practice 4.2a (b) 20 million
(c) 3.3 minutes
RM154 Self Practice 4.3b
1. (a) Rate = ; 5. (a) 3 : 4 : 2
2 passengers 1. 50 players
amount of money (RM) 2. 100 times (b) Nitrogen: 4.5 kg
Phosphorus: 6 kg

and number of passengers 3. 510 chilli plants Potassium: 3 kg
(person).

311
Answers

14 Ans Math F1.indd 311 11/10/16 12:23 PM