Answer:
The cable would stretch 14 cm when loaded with 1000 kg ore.
Explanation:
The question is incomplete.
The complete question would be.
A mine shaft has an ore elevator hung from a single braided cable of diameter 2.5 cm. Young's modulus of elasticity of the cable is
. When the cable is fully extended, the end of the cable is 700 m below the support.
How much does the fully extended cable stretch when 1000 kg of ore is loaded into the elevator?
Given the diameter of the cable is
. The length of the cable is
.
And the mass of the ore is
. Also the Young's modulus of elasticity of the cable is
.
We will use Hook's law

Where
is stress. E is Young's modulus of elasticity. And
is strain.
We can rewrite .

Where
is the applied force,
is the area of the cross-section.
is the change in length.
is the initial length of the cable.
Also, the applied force
is due to mass of the ore. That would be 
Given diameter of the cable
.



Plugging these values
.
So, the cable would stretch 14 cm when loaded with 1000 kg ore.