Ditanya rangkaian seri sama paralel . tolong bantuyah ;)

Rangkaian pengganti = Rangkaian seri + paralel
R.paralel = 1/R1 + 1/R2 + …..
= 1/60 + 1/60
= 2/60
R paralel = 60/2
= 30
R Pengganti = 30ohm + 50ohm
= 80ohm