A tomato-juice evaporator takes in juice at the rate of 1200kgh-1 . If the concentrated juice contains 35% of solids and the hourly rate of removal of water is 960 kg, calculate: (a) % water in the original juice and (b) the quantity of steam needed per hour for heating if the evaporator works at a pressure of l0kPa and the heat available from the steam is 2200kJkg -1 . Assume no heat losses