Jawapan

2016-09-23T21:33:17+08:00
Luas = (300×7.2)×(300×2.5) = 1620000cm² = 162 m²
2016-09-23T21:41:08+08:00
Luas skala : 7.2 x 2.5= 18cm^2 , Luas bilik: 1/300 x 18/x , x = 18 x300 = 5400cm^2 , dy nk dlm m so bahagi 100 , jwpnnya : 54 m^2