tolong kerjakan no.2 ya

p = l + 5
t = 3l
l = l = lebar
Kerangka balok = 4( p + l + t)
100 = 4[( l + 5) + l + 3l]
100 = 4 ( 5l + 5)
100 = 20l + 20
100 - 20 = 20l
80 = 20l
l = 80 ÷ 20 = 4
lebar = 4 cm
p = l + 5 = 4 + 5 = 9 cm
t = 3l = 3×4 = 12 cm

Cek.
4( 9 + 4 + 12) = 4×25 = 100cm

Tolong jadikan jawaban terbaik..