Discussion
Considering the stress-strain curve to be linear up to the break point, the tensile strength is
Answer: B
The tensile strength is 208.3 kg/cm2.
Tensile strength is the breaking load divided by the original cross-sectional area:
\[ \begin{aligned} \sigma &= \frac{50}{0.8 \times 0.3} = \frac{50}{0.24} \\ &= 208.3\ \text{kg/cm}^{2} \end{aligned} \]
The stress-strain curve being linear to the break matters for the next part, the modulus, not for the strength. The other options would need a different area or load; 535.5, for example, is far too high for a 50 kg load on 0.24 cm2.
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