A load of 31.4 kg is suspended from a wire of radius `10^-3` m and density `9 xx 10^3 kg m^-3`, Calculate the change in temperature of the wire, if 75% of the work done is converted into heat. Given that Young's modulus and heat. capacity of the material of the wire are `9.8 xx 10^10 Nm^-2` and `490 Jkg^-1 K^-1` respectively.