A certain amount of ice is supplied heat at a constant rate for 7 min. For the first one minute the temperature rises uniformly with time. Then it remains constant for the next 4 min and again the temperature rises at uniform rate for the last 2 min. Given `S_("ice")=0.5cal//g^(@)C,L_(f)=80cal//g`. The initial temperature of ice isA. `-10^(@)C`B. `-20^(@)C`C. `-30^(@)C`D. `-40^(@)C`

A certain amount of ice is supplied heat at a constant rate for 7 min.

1.	A certain amount of ice is supplied heat at a constant rate for 7 min. For the first one minute the temperature rises uniformly with time. Then it remains constant for the next 4 min and again the temperature rises at uniform rate for the last 2 min. Given `S_("ice")=0.5cal//g^(@)C,L_(f)=80cal//g`. The initial temperature of ice isA. `-10^(@)C`B. `-20^(@)C`C. `-30^(@)C`D. `-40^(@)C`
Answer» Correct Answer - D

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