Water condenser condenses steam at $100$ oC using a cold water at $20$ oC with a flow rate of $0\mathrm{.}32$ kg$/$s$.$ The cold water leaves the condenser at $70$ oC$.$ Overall heat transfer coefficient is $2290$ W m$-2$ K$-1.$ The water specific heat is a constant of $5\mathrm{.}12$ kJ kg$-1$ K$-1.$ What is the required contact area for condenser.