Answer :

As the three resistors are in parallel combination to each other , so , let the total resistance of the 3 resistors be R3 and the total resistance of the two resistors be R2 ,

Let the three resistors be Ra , Rb , Rc .

First we will calculate the total resistance of 3 resistors,

We are given with the values of R3 = 60/47 ohm and R2 = 15/8 ohms ,

When one wire is broken down , let the wire be of resistance Ra , so

Put the value of two resistor equation in three resistor equation ,

We get ,

Hence this is the required resistance.

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