Maths, sum, riddle, thing. Win 10 points if you get it right first.?!

I made this maths, sum, riddle thing up!. If you get it right first you get 10 points!.

There were five rabbits in a cage!. One rabbit eats half a carrot every half an hour!. Another eats one and a quater every hour and five minutes!. The rest eat one every hour!.

How many carrots would they go through in seven days and three hours!.Www@Enter-QA@Com

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