Nomer 21 yang di foto tolong di jawab

R total = R paralel
1/Rparalel = 1/R1 + 1/R2 + 1/R3
1/Rp = 1/15 + 1/10 + 1/6
1/Rp = 2/30 + 3/30 + 5/30
1/Rp = 10/30
10Rp = 30
Rp = 30/10
Rp = 3 ohm

GGL (E) = I . (Rek)
E = I . (R + r)
12 = I . (3 + 2)
12 = I . 5
I = 12/5
I = 2,4 A