Question

Keliling sebidang kebun 280 meter . Jika panjang kebun = 1 1/3 X lebarnya , berapa cm² luas kebun
tersebut?
~~~~dengan cara nya~~~~

Answer 1

 K = 2 l + 2 p
280 = 2. l + 2 (1 1/3 l)
280 = 2 l + 8/3 l
280 = 2 8/3 l
l = 280 : 14/3
l = 280 . 3/14
l = 60 cm

p = 1 1/3 . l
p = 4/3 . 60
p = 80 cm

L = p . l
L = 80 . 60 = 4800 cm²