Răspunsuri

2014-06-05T22:02:32+03:00
4b.............3h...........3kw
6b..............20h.........x

In primul rand aflam cat consuma 6 becuri in 3 ore.

4b..........3h........3kw
6b..........3h........x

Deoarece la mijloc avem 3h si 3h in ambele randuri nu il consideram, deci;

x= \frac{6X3}{4}x= \frac{18}{4}

Acum ca stim cat consuma 6 becuri in 3 ore putem afla cat consuma in 2o ore:

6b.........3h.......... \frac{18}{4} kw
6b.........20h.........x

x= \frac{20 \frac{18}{4} }{3} ⇒x=30kw
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