on diwali eve 2 candles one of which is 3cm longer than the other are lighted.the longer one is lighted at5.30pm and the shorter at 7pm.at9.30pm they both are of same length.the longer one burns out at11.30pm and the shorter one at 11pm.how long each candle originally

long candle burned for 6 hours and shorter for 1hour 30 mins
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6 hrs and 1hr 30 min respectively
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27 cm and 24 cm respectively
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