3 x 60min. =......... sek Potrzebne na jutro 10 punktów czeka..!!

3*60min=180min 1min=60sek 180min*60sek=10800sek   ODP. 10800sekund  

3*60min=180min 1 min=60s 180min=x x=180*60=10800s   3x60min=10800s