Stage: 4 Challenge Level: 
Two different candles are lit. They burn at different rates and one is 3 cm longer than the other.
The longer one was lit at 5.30 pm and the shorter one at 7 pm.
At 9.30 pm they were both the same length.
The longer one, burned out at 11.30 pm and the shorter one burned out at 11 pm.
How long was each candle originally?
Forces. Calculating with ratio & proportion. biology. Short problems. physics. Individual. chemistry. Modulus arithmetic. Linear equations. engineering.
Published March 1997.
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