Steam in a counter flow condenser of a steam power plant is to be condensed at a temperature of 30C with cooling water from a nearby lake, which enters the tubes of the condenser at 14C and leaves at 22C. The surface area of the tubes is 45 m2 and the overall heat transfer coefficient is 2100 W/m2-K. Calculate the mass flow rate of cooling water needed and the rate of steam condensenation in the condenser.