Question

un dreptunghi aree lungimea 36m iar latimea cat 4/9 din lungime. Afla perimetrul dreptungiului.

Answer 1

36 : $\frac{4}{9}  = 36 * \frac{9}{4}    = \frac{36 * 4}{9}   = 4 * 4   = 16$

P = 2 * ( L + l )
P = 2 * 52
P = 104

Answer 2

L=36m
l=4/9 *L
P=?

l=4/9 *L
l=4/9 *36m
l=4*36/9
l=144/9
l=16(m latimea)

P=(L+l)*2
P=(36m+16m)*2
P=52m*2
P=104(m perimetrul)