Plis bantu jawab + caranya :)

Dik :
R1 = 12 ohm
R2 = 6 ohm
V = 6 Ampere
t = 10 menit = 600 detik
"""""'
Rtot = 4 ohm
I = V/R = 6/4 = 1,5
'''''''
W = V.I.t = 6 x 1,5 x 600 = 5.400
'''''''''''''