" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
2 ( 5x + 4x) = 54
2( 9x )= 54
18x = 54
x = 54/18
x = 3
panjang = 5 x 3
= 15
lebar = 4 x 3
= 12
luas = p x l
= 15 x 12
= 180 cm²
l = 4x
Kel. = 2 (p + l)
54 = 2 (5x + 4x)
54 = 2 * 9x
54 = 18x
54 / 18 = x
x = 3
p = 5x = 5 * 3 = 15
l = 4x = 4 * 3 = 12
L. = p * l
= 15 * 12
L. = 180 cm²