Question-174975

Question Number 174975 by sciencestudent last updated on 15/Aug/22

Answered by MikeH last updated on 15/Aug/22

R_{1} + R_{2} = 690 or x + y = 690 \dots . . (1)

\frac{x y}{x + y} = 150

\Rightarrow \frac{x y}{690} = 150 \Rightarrow x y = 103500

from (1) x = 690 - y

\Rightarrow y (690 - y) = 103500

\Rightarrow y^{2} - 690 y + 103500 = 0

y = 220.4 Ω or y = 469.6 Ω

so R_{1} = 220.4 Ω and R_{2} = 469.6 Ω

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