5) 5000 kg/m³ = ……………… g/cm³

5]

5000 kg/m^3

= (5000 × 1000) g/(1 × 1000000) cm^3

= 5000000 g/1000000 cm^3

= 5 g/cm^3

6]

4 g/cm^3

= (4 : 1000) kg/(1 : 1000000) m^3

= 0,004 kg/0,000001 m^3

= 4000 kg/m^3

7]

90 km/jam

= (90 × 1000) m/(1 × 3600) s

= 90000 m/3600 s

= 25 m/s

8]

20 m/s

= (20 : 1000) km/(1 : 3600) jam

= (1/50) km/(1/3600) jam

= (1/50 × 3600/1) km/jam

= 72 km/jam