A river has a dry-weather discharge of 100cfs and a temperature of 25C. Calculate the maximum discharge of cooling water at 65C that can be discharge from a power plant into the stream. Assume the legal limit on temperature increase in the stream is 2C. [Answer: 5.3cfs, note: the discharge of warm water cannot exceed 5.3cfs if the stream temperature is not to increase more than 2C ]. [5 Marks]