Question

A 1.5m wire carries a 3 A current when a potential difference of 86 V is applied. What is the resistance of the wire?

Answer 1

We know, R = V / I
Here, V = 86 V
I = 3 A

Substitute their values, 
R = 86 / 3
R = 28.67 Ohm

In short, Your Answer would be 28.67 Ohms

Hope this helps!