První traktorista zora lán pole za a hodin.druhy má výkonnější stroj a zoralvby tentýž lán o 5 hodin drive nez prvni .Vyjadrete jakou část lanu Za 1 hodinu a)zora 1 traktorista..b)by zoral 2traktorista.. c)by zorali oba traktoriste spolecne... 2 ukol užitná hodnota osiva v procentech podle vzorceU= č.k/100 kde č je čistota osiva v procentech.k je klicivost v procentech..Vypocitejte užitnou hodnotu osiva pro č=97 procent.k=95procent
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