Answer: 61.235 kg
Explanation: To convert pounds to kilograms, you can use the conversion factor where 1 pound is approximately 0.453592 kilograms. Therefore, to convert 135 pounds to kilograms, you multiply by this factor:
\[
135 \, \text{lbs} \times 0.453592 \, \text{kg/lb} \approx 61.235 \, \text{kg}
\]