tolongin dong no 35-40 pake caraaa

35)
R pengganti: 1/20 + 1/20 = 1+1/20 = 2/20
Rp: 20/2 = 10

Berarti= 25 + 10 + 25 = 60 (A)

39)
Dik:
v= 220V
i= 0,5A
t= 30menit × 60 = 1800s
Dit:
w=...?
Dij:
w= v.i.t
= 220 × 0,5 × 1800
= 198000 Joule