A single shell pass heat exchanger will be used to condense $10k\frac{g}{s}$ of saturated organic vapor $($Tsat $=80C$;$h_{fg}=600k\frac{J}{k}g)$ with cooling water $),$ inlet temperature of $15C,$ flows in the tubes at $60k\frac{g}{s}.$ The overall heat transfer coefficient is $1800\frac{W}{m^2}K.$ The thin$-$walled tubes used are $25mm$ in diameter and $5m$ long pumber of of cooling water is $3\frac{m}{s}.$ What are the number of tubes per pass and that as $1\mathrm{.}0$ for consere required? You can take correction factor for logarithmic mean temperature as $1\mathrm{.}0$ for condenser.