A particular polymer sample can be represented by a single Maxwell model. When a tensile stress of 10^3 Pa is applied for 10 s, the maximum length...

A particular polymer sample can be represented by a single Maxwell model. When a tensile stress of 10^3 Pa is applied for 10 s, the maximum length attained by the specimen is 1.15 times the original length. After removal of the stress (at 10 s), the length is only 1.10 times the original length. What is the relaxation time of the model?