Before Christmas, Eva bought two cylindrical candles - red and green. Red was 1 cm longer than green. She lit a red candle on Christmas Day at 5:30 p. M. , lit a green candle at 7:00 p. M. , and left them both on fire until they burned. At 9:30 p. M. , both candles were the same height. Green finished at 23:00, red at 23:30.

How tall was the red candle when it was new?

Correct result:

c =  15 cm


 z1=c (23.5017.50) v1=c (23.0019.00) v2=z (21.5017.50) v1=(21.5019.00) v2  cz=1 c6v1=0 4v2z=0 4v12.5v2=0  c=15=15 cm v1=52=2.5 v2=4 z=16   Verifying Solution:  x1=(21.5017.50) v1=(21.5017.50) 2.5=10 cm x2=(21.5019.00) v2=(21.5019.00) 4=10 cm

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