Question

A 1.5m wire carries a 7 A current when a potential difference of 64 V is applied. What is the resistance of the wire?

Answer 1

$R=\dfrac{V}{I}=\dfrac{64 V}{7 A}=\dfrac{64}{7}\,\Omega\approx9.143\,\Omega$

The resistance of the wire is about 9.143 ohms.