A candle of 6 cm long burns at the rate ...

A candle of 6 cm long burns at the rate of 5 cm in 5 h and another candle of 8cm long burns at the rate of 6 cm in 4 h. What is the time required by each candle to remain of equal lengths after burning for some hours, when they starts to burn simultaneously with uniform rate of burning?

1 h

1.5 h

2 h

None of these

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