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2014-10-01T18:06:32+03:00
1 robinet ........ 25l /min
6 robinete....... x l/min ⇒x=6·25=150 l/min

1 min..............150 l
20 min.............y l⇒y=20·150=3000

1 5 1
2014-10-01T18:09:59+03:00
1 min =25 l apa = 1 robinet
20 min = 20x25=>500 l apa
6 robinete = 500x6= 3000 l apa
 Bafta ^^