jawab dengan benar ya no 8 - 11

no. 8
40/120 × 100% = 1/3 × 100% = 33,3%

no.9
diket: Ridho = 24 th
Edo = (24+6) th = 30 th

umur Ridho : umur Edo
= 24 : 30
= 4 : 5

no. 10
diket:
luas kebun A : luas kebun B = 3 : 7
luas kebun A = 600 m^2

(3+7)/3 × 600 = 10/3 × 600 = 2000 m^2
luas kebun B = 2000-600= 1400 m^2
luas kebun seluruhnya = 2000 m^2

no. 11
A:B:C = 8:5:7
A+B+C = 132

A=8/(8+5+7) × 132 = 8/20 × 132 = 52,8

B=5/(8+5+7) × 132 = 5/20 × 132 = 33

C=7/(8+5+7) × 132 = 7/20 × 132 = 46,2