A typical coalfired electric power plant produces 1,000 MW of electricity by burning fuel with an energy content of 2,800 MW; 340 MW are lost as heat up the smokestack, leaving 2,460 MW to power turbines that drive a generator to produce electricity. However, the thermal efficiency of the turbines is only 42 percent. That means 42 percent of this power goes to drive the generator, but the rest (58 percent of 2,460 = 1,430 MW) is waste heat that must be removed by cooling water. Assume that cooling water is withdrawn from a nearby river at the rate of 40 m3/s and that all of the cooling water withdrawn from the river is returned to the river. The total flow rate of the river is 125 m3/s. The upstream temperature is 23 oC increments. Calculate the temperature of the river downstream of the power plant