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19-07-2020
Mathematics

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perimetrul unei gradini in forma de derptunghi este de 800m afla laturile gradini stind ca lungimea este de 3 ori mai mare decat latimea

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19-07-2020

L = Latura mare

l = latura mica

P = L + l + L + l = 2L + 2l

P = 800 m

L = 3 × l

2(3 × l + l) = 800 m

2 × 4 × l = 800 m

8 × l = 800 m

l = 800 : 8

l = 100 m

L = 3 × l

L = 3 × 100

L = 300 m

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