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Tuesday, 22 january 2013 |
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Problema cu clepsidre |
Proposed by
Gabi |
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| (8 comments) | 5.388 times displayed |
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Avem doua clepsidre: cu una se masoara patru minute, cu alta sapte minute.
Cum masuram cu aceste clepsidre un interval de noua minute ? |
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Pentru inceput sa notam clepsidrele : C4 cea care masoara 4 min. si C7 cea care masoara 7 min.Acum....Varianta I :Se intorc simultan cele doua clepsidre.Cand clepsidra C4 s-a terminat se intoarce din nou-deci au trecut 4 min iar C7 mai are 3 min.Cand trec si cele 3 min.din C7 se intoarce C7-deci au trecut 7 min.iar in clepsidra C4 a mai ramas 1 min.Cand se scurge si acel minut inseamna ca au trecut 8 min dar in acelasi timp s-a scurs si 1 min. din C7 pe care o intoarcem si la finalul acelui min.avem 9 minute.Adica 8 min. +1 min.=9 min. Varianta II :Se intorc simultan cele doua clepsidre.Cand C4 s-a terminat se intoarce,C7 mai are in acest moment 3 min.Cand si C7 s-a terminat in C4 a mai ramas 1 min.Din acest moment se incepe masurarea celor 9 min.Deci a mai ramas 1 min. din C4 si cand se termina mai intoarcem C4 de doua ori,deci inca 8 min.In total 9 min. |
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Tags:
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Problema,
cu,
clepsidre
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