Question

A steel wire of diameter 2 mm has a breaking strength of 4 × 10⁵ Newton. What is the breaking force of a similar steel wire of diameter 1.5 mm?
(a) 1.125 × 10⁵ N
(b) 1.5 × 10⁵ N
(c) 2.25 × 10⁵ N
(d) 3 × 10⁵ N