Răspunsuri

2014-05-02T12:35:53+03:00
P=2l+2L=8 400
l=5/9 *L=  5L/9

2* 5L/9 +2L=8 400
10L/9 +2L=8400  aducem la acelasi numitor
10L+18L=75600
28L=75600
L=2700
l=5*2700/9=  5*300=1500

2700:5=540 tei se planteaza
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