physics
posted by Anonymous .
2 liters of water at 80.c is found into a plastic bucket containing 10 liters of water at 20.c what is the final temperature of water ( density of water 1kg/litre) (neglect the heat gained by bucket and specific heat capacity of water = 1cal/gm.c

m1•c(t1t) = m1•c(tt2)
m=D•V
D•V1(t1t) = D•V2(tt2)
2(t1t) = 10(tt2)
t1+5t2=6t
t=30ºC