Question

Bantu aku yaa teman" tolong banget pake cara biar ngerti

Answer 1

Verified answer

Bangun Datar

Diketahui:
K persegi panjang = 80 cm
p : l = 7 : 3
p = 7n
l = 3n
Ditanya:
L persegi panjang = ?

Jawab:
K persegi panjang = 2 (p + l)
80 = 2 (7n + 3n)
80/2 = 10n
40 = 10n
n = 40/10
n = 4

p = 7n
p = 7 x 4
p = 28 cm

l = 3n
l = 3 x 4
l = 12 cm

L persegi panjang = p x l
= 28 x 12
= 336 cm^2 (A).

*semoga membantu. sukses selalu ^_^