Answer / zoho

3 hrs

Answer / subashl

3 Hr is the Answer
Thick can last for 6hr. Thin can last for 4 hr. Let LCM of 6,4 be the total length of candle. Candle Length = 12
Hence, their efficiency ratio is
Th : Tn = 2 : 3 (In 1hr, 2 parts of Thick candle and 3 parts of thin candle Burnt down)
Hence in 3 hr, 6 parts of Thick candle and 9 parts of Thin candle burnt down
Remaining 6 parts of Thick candle and 3 parts of Thin candle is there Out of 12 parts(It is of ratio 2 : 1)
Hence 3 hr is the answer

Answer / anunithi

2 hrs

Answer / nits

4 hrs

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