Page 22 - Steady Mate Tg1 - Book B

Matematik Tingkatan 1 Bab 4 Nisbah, Kadar dan Kadaran

Contoh 3. RM120 per kg (sen per g) 4. RM1.65 per l (sen per ml)
RM50 per kg (sen per g) RM120 = (120 × 100) sen RM1.65 = (1.65 × 100) sen
1 kg (1 × 1 000) g 1 l (1 × 1 000) ml
RM50 = (50 × 100) sen
1 kg (1 × 1 000) g = 12 000 sen = 165 sen
1 000 g 1 000 ml
5 000 sen
= = 12 sen per g = 0.165 sen per ml
1 000 g
= 5 sen per g

2
2
Contoh 5. 68 000 N/m (N/cm ) 6. 15 N/cm (N/m )
2
2
2
2
40 000 N/m (N/cm ) 68 000 N = 68 000 N 15 N = 15 N
1 m 2 (100 × 100) cm 2 1 cm 2 (0.01 × 0.01) m 2
40 000 N = 40 000 N
1 m 2 (100 × 100) cm 2 = 68 000 N = 15 N
10 000 cm 2 0.0001 m 2
40 000 N
= = 6.8 N/cm 2 = 150 000 N/m 2
10 000 cm 2
= 4 N/cm 2

Contoh 7. 30 m/s (km/j) / (km/h) 8. 50 cm/s (m/min)
25 m/s (km/j) / (km/h) 30 m = (30 ÷ 1 000) km / km 50 cm = (50 ÷ 100) m
1 s 1 ÷ (60 × 60) j h 1 s (1 ÷ 60) min
25 m = (25 ÷ 1 000) km / km
1 s 1 ÷ (60 × 60) j h = 108 km/j = 30 m/min
108 km/h
= 90 km/j
90 km/h

Contoh 9. 60 ml/s (l/min) 10. 150 ml/s (l/jam) / (l/hour)
45 ml/s (l/min) 60 ml = (60 ÷ 1 000) l 150 ml = (150 ÷ 1 000) l / l
1 s (1 ÷ 60) min 1 s 1 ÷ (60 × 60) jam hour
45 ml = (45 ÷ 1 000) l
1 s (1 ÷ 60) min = 3.6 l/min = 540 l/jam
540 l/hour
= 2.7 l/min

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