Answer:
1) Increase in the diameter equals 3.5 mm
2) Increase in the length equals
where
is the initial length of the vessel.
Step-by-step explanation:
The diametric strain in the vessel is given by

We have

Applying values we get

Similarly axial strain is given by


Applying values we get

Hence The effect of axial strain along the diameter is given by

Applying values we get

hence

Now by definition of strain we have

Increase in the diameter is thus 3.5 mm
Using the same procedure for axial strain we have

Applying values we get


Now by definition of strain we have

where
is the initial length of the cylinder.