Question

A twelve inch candle and an 18 inch candle are lit at 6 pm. The 12-in. candle burns 0.5 inches every hour. The 18 inch candle burns two inches every hour. At what time will the two candles be the same height? What equation describes this scenario?

Answer 1

 18 - 2t = 12 - 0.5t 
6 = 1.5t 
t = 6/1.5 
t = 4 hours 
time required to have the same height = 4hours 
At what time ? 
answer : at 10pm 
------------------- 
12inch candle lasts longer ..