Question

three resistance of which two are equal when connected in series have an affective resistance of 30 ohm And when three resistances
are connected in parallel effective resistance is three om
find the values of individual resistance

Answer 1

Let 3 resistors be a, b, c

a + b + c = 30

2a + b = 30. ----- 1eq

$\frac{1}{a} + \frac{1}{b} + \frac{1}{c} = 3$

$\frac{2}{a} + \frac{1}{b} = 3$
$\frac{a + 2b}{ab} = 3$



Solve the 2 equations

Answer 2

is the answer 75ohm, 50ohm and 50 ohm.

happy helping mate..