Răspuns :

100 dm = 10 m  

15 - 10 = 5 m latimea gradinii  

( 15 + 5 ) x 2 = 20 x 2 = 40 m masoara gardul care inconjoara gradina

Crys157724id

100 dm = 10 m

L =15 m

l= 15-10 => l = 5 m

P = 2×( l+L ) = 2×( 15+5)=2×20=40 m ( are gardul )

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