Question

Aflati laturile si aria unui dreptunghi daca lungimea este de 5 ori mai mare decat latimea si perimetrul 144 m

Answer 1

L /---/---/---/---/---/ Total 144
l /---/
L /---/---/---/---/---/
l /---/
144:12=12
L=12•5=60
l=12
A=60•12=720 m ²

Answer 2

P =144 m
L =5 l
P =2L+2 l
144 =2*5 l+2 l
144 =10 l+2 l
12 l =144
l =12 m
L =5 l =5*12 =60m
A =L+ l
A =60*12 =720 m