tolong dibantu ya pakai cara no 14

36 cm 2 x 50 = 1800cm2 = 18 m2

13. Pipa Awal
= 1,5+0,75
= 2,25m
= 9/4m

Sisa
= 9/4 - 1/8
= 18/8 - 1/8
= 17/8
= 2 1/8m (B)

14. Luas pada denah = 36cm^2
Luas = s^2 = 36 cm^2
sisinya = 6cm

Sisi asli = 6×50 = 300cm = 3m
Luas aslinya = 3 × 3 = 9m^2 (B)