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

• ক 1.5 hours
• খ 1 hours
• গ 4 hours ✅ সঠিক উত্তর
• ঘ 2 hours