tolong jawab secepatnya please

1. Lebar = 1/4 (Panjang)
Berarti :
Panjang = 4(Lebar)
= 4(4) = 16 cm
Maka keliling = 2(P+L)
= 2(16+4)
= 2(20) = 40 cm

2. K = 100 cm
P = 48 cm
Maka :
K = 2(P+L)
100 = 2(48 + L )
100 = 96 + 2L
2L = 100 - 96
2L = 4
L = 4/2
L = 2