Chorlton High played for 40 minutes when they were knocked out.
Each match have two halves of 20 minutes each.
If the teams are level at the end of normal play, two extra 10-minute periods are played.
If it is still a draw, teams take penalty shots at goal to decide the winner.
Chorlton High were eventually knocked out in the semi-final (without extra time).
So, they played for two halves of 20 minutes each.
Therefore, they played for 40 minutes when they were knocked out.
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