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A certain amount of ice is supplied heat at a constant rate of 7 minutes. For the first one minute the temperatue rises uniformly with time. Then it remains constant for the next 4 minutes and again the temperature rises at uniform rate for the last two minutes. Calculate the final temperature at the end of 7 minutes.(Given L of ice = 336*10^3 J/kg and specific heat of water = 4200 J/kg-K.)
let amount of ice be x kg, rate of supply of heat=y J/minute
let specific heat of ice be z J/kg/K, and initial temperature of ice be -w celcius
4*y=x*(L of ice)
x*z*w=y
let final temperature be T,
4200*x*T=y*2
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