Step 1:

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Observe the circuit.

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Node between the resistors $\"\"$ and $\"\"$ makes the connection parallel and the resultant will be in series with the resistor $\"\"$ .

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Node between the resistors $\"\"$ and $\"\"$ makes the connection parallel.

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Redraw the circuit.

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$\"\"$

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Resultant of $\"\"$ and $\"\"$ :

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Resultant resistance of parallel resistors formula: $\"\"$ .

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$\"\"$

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Substitute $\"\"$ in the above expression.

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$\"\"$

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Above resultant is in series with the resistor $\"\"$ .

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Resultant of $\"\"$ and $\"\"$ .

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Series resultant resistance formula : $\"\"$ .

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$\"\"$ .

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Resultant of $\"\"$ and $\"\"$ :

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$\"\"$

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$\"\"$

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Above resultant is in series with $\"\"$ .

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Therefore, $\"\"$ .

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Solution :

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Equivalent resistance is $\"\"$ .