1000 Kg of liquid at 30°C in a well stirred vessel has to be heated to
120°C, using immersed coils carrying condensing steam at 150°C. The area
of the steam coils is 1.2 m2 and the overall heat transfer co-efficient to the
liquid is 1500 W/m2
.°C. Assuming negligible heat loss to the surrounding
and specific heat capacity of the liquid to be 4 kJ/kg.°C, the time taken for
the liquid to reach desired temperature will be
(A) 15 min
(B) 22 min
(C) 44 min
(D) 51 min