Q24. At room temperature ( $27 ^ { \circ } \mathrm { C }$ ), the resistance of a heating element is $50 \Omega$. The temperature coefficient of the material is $2.4 \times 10 ^ { - 4 } { } ^ { \circ } \mathbf { C } ^ { - 1 }$. The temperature of the element, when its resistance is $62 \Omega$, is $\_\_\_\_$ ${ } ^ { \circ } \mathrm { C }$.