a) \(N=\dfrac{0,408.10^4.2}{3,4}=2400\left(Nu\right)\)
Ta có: \(\left\{{}\begin{matrix}N=2A+2G=2400\\H=2A+3G=3120\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}A=T=480\left(Nu\right)\\G=X=720\left(Nu\right)\end{matrix}\right.\)
b) Số nu ở mạch 2:
T2=A1=20%.1200=240(Nu)
G2=X1=150(Nu)
A2=A-A1=480-240=240(Nu)
X2=G-G2=720-150=570(Nu)