nilai perbandingan ktotal pd gambar dibawah ini adlah? tolong dibantu

1/ks = 1/k + 1/2k + 1/k
= 4+1/2k
= 5/2k => ks = 2k/5
Kp = k + 2k + k
= 4k
Ks:kp = 2k/5 : 4k/1
= 2k/5 x 1/4k
= 1/10. => 1: 10