How much solar energy is needed here?

Question: How much solar energy (kJ) would have to be transferred to a 193.0 foot length of asphalt highway that is 40.0 feet wide and 19.4 centimeters deep in order to raise the temperature 2.50 oC ?


The average density of asphalt is 721 kg/m3


The specific heat of asphalt is 0.920 kJ/kg-oC

Answer:
I got 230,742 kJ

193ft * 40ft * 19.54cm*1ft/30.48cm * 1 m^3/(3.2808ft^3) *721 kg/m^3 * 0.92kJ/kg-deg C = 230,742 kJ

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