Question 1206164
A bunch of words.  Just try to identify the different parts.


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The stress in the material of a pipe subject to internal pressure varies jointly with the internal pressure and the internal diameter of the pipe and inversely with the thickness of the pipe.
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s,  the stress in the pipe material
p, internal pressure
d, pipe diameter
t, pipe thickness
k, variation constant


How the value for s is described
{{{s=kpd(1/t)}}}


or  


{{{s=k((pd)/t)}}}.


The given values in the next part of the description should let you find k and then to answer the question.