Question

calculate the effective resistance

Answer 1

it's answer is 29.......

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Answer 2

$let \: a = 2ohm \\ b = 5ohm \: \\ and \: the \: value \: of \: resistor \: connected \: in \: parallel \: be \: x$

1/x = 1/12 + 1/6 + 1/4

1/x = 3/12 + 1/4

1/x = 1/4 + 1/4

x = 2 ohm

$total \: resistance = 2 + 5 + 2 = 9ohm$