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2014-02-11T18:25:17+02:00
200kg..............160kg
420kg.................x kg

x = 420 * 160 / 200 = 336 kg

200kg.........160kg
y kg ...........3000kg

y = 200*3000 / 160 = 3750 kg

Se foloseste deci regula de trei simpla. Succes !
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