Question

Jika 20% A = 50% B dan 75% B = 90% C, maka 30% A = ....... % C

a.60
b.75
c.90
d.100

Answer 1

20% A = 50% B
20 A = 50 B
B = 20A/50
B = 2A/5

75% B = 90% C
75 B = 90 C
75 × 2A/5 = 90 C
30 A = 90 C (per 100 kedua ruas)
30/100 A = 90/100 C
30% A = 90% C

Jawaban: C

Answer 2

20% a =50%b,
maka, 100% b =40% a.
100% b =40% a , maka, 25% b = 10% a.
25%×3=75% b. maka,10%×3=30% a.
Jadi,
75%b =30%a =90%c.
Jawabannya c. 90.
Semoga membantu, harap jadikan yang terbaik.