November 2018 2 34 Report

Mam problem z zadaniem, liczyłam je już wiele razy, ale nic sensownego mi nie wychodzi :

W piwnicy stoją dwie 77 litrowe beczki. Pierwsza wypełniona jest wodą, a druga pusta. Z pierwszej beczki wypływają w pierwszej sekundzie 4 litry wody, a w każdej następnej o 0,2 litra mniej. Równocześnie do drugiej beczki wlewa się w pierwszej sekundzie 1,5 litra wody, a w kazdej następnej o 0,5 litra więcej. Po ilu sekundach poziom wody wyrówna się?

Poprawna odpowiedź to 11sekund.

Z góry dziekuję za pomoc.


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Przepisz dania stosując okres warunkowy II lun III:1) I took the newspaper because I didn't know that you were reading it. If I ...........................................................................................................................2) I shouldn;t have drunk so much. I felt terrible next day. I wouldn't ..............................................................................................................3) He doesn't learn much. He gets poor marks.If he ...............................................................................................................4) She feels lonely. She should make new friends.If she .................................................................................................................5) Tom paid a fine. He lit a cigarette in a non-smoking compartment.Tom wouldn't ....................................................................................6) They weren't ready. They started too late. If they ............................................................7) I cannot buy a new flat. I don't earn much enough.If I ...........................................................................8) She didn't give me a prescription. I didn't ask for it.She would ..............................................................9) The air is polluted. The factories emit toxic fumes.The air ....................................................................10) Your food goes stale. You don't keep it in your refrigerator. If you...................................................................................Z GÓRY DZIĘKUJĘ ZA ODP.
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