Question

Dokonaj zamiany jednostek : 1. 30 km/min = ? km/sekundy
2. 120 m/min = ? cm/sek
3 . 18 km/h = ? m/s
4 . 90 cm/min = ? cm/s
5. 90 m/s = ? km/s
6. 54 km/h = ? m/s
7 . 10 m/min = ? km/h

Answer 1

 1. 30 km/min =  0,5 km/sekundy 

1min=60sek   30km/60sek
2. 120 m/min =  200 cm/sek

120m=12000cm   1min=60sek   12000cm/60sek
3 . 18 km/h = 5 m/s

18km=18000m   1h=3600sek   18000m/3600sek
4 . 90 cm/min =  1,5 cm/s 

1min=60s   90cm/60sek
5. 90 m/s = 0,09 km/s 

90m=0,09km    
6. 54 km/h =   15m/s

54km=54000m   1h=3600s  54000m/3600s

7 . 10 m/min =   0,6km/h

10m=0,01km  1h=60min   0,01km*60min(czyli 1h)

Answer 2

1 30km/min= 0,5 km/sek

(mnożysz 30*1/60)

2. 120m/min= 200cm/sek

(120* 100/60)

3. 18 km/h= 5m/s

(18* 1000/3600)

4. 90cm/min= 1,5cm/sek

(90* 1/60)

5. 90m/sek= 0.09km/sek

(90* 0,001)

6. 54km/h= 15m/s

(54*1000/3600)

7. 10m/min=  0,6 km/h

(10* 0,001/60)