1. Kran dostarcza do zbiornika w ciągu 2 minut 13 litrów wody. Po ilu minutach dostarczy 156 l? 2. Kran dostarcza do zbiornika w ciągu 20 sekund 27 1/4 litra wody. Po ilu minutach dostarczy 654 l?
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1.156/13 12*2= 24 min
2. 654/27,25=24 27,25*3 81,75
654/81,75=8 8min