How much time does it take to warm 2 litres water

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A resistance of 5(ohms) is connected to a 100V supply. If this resistance increase with temperature of 1 litre of water in 10 minutes by 1(oC-degree celsius), how much time it will take to increase temperature of 2 litres of water by 1(oC) if voltage is increased to 200V...

Can I have an answer with solution...
:confused:
 
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Thread moved to Homework Help Intro Physics.

mahaima, welcome to the PF. You must post homework/coursework questions in the Homework Help forum area of the PF, and you must show us your own work so far, before we can offer tutorial help.

How would you start this problem?...
 

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