The Correct Answer is "120".

• ​The idea of extra-time in football was also added to the rules with those 1897 amendments, at least for British clubs and competitions.
• It wasn't the case everywhere, though, which is demonstrated neatly by the German Championship final of 1922 when Hamburg and Nuremberg were drawing 2-2 after 90 minutes but wanted to find a winner.
• They decided to keep playing until a team scored, resulting in another 99 minutes of football.
• Even then it wasn't a goal that ended the contest so much as it was the encroachment of night.
• When the two sides met for a replay seven weeks later they did include extra-time, but the match still couldn't be finished because of the number of injuries and sendings off.

• In a professional football match that typically lasts 90 minutes, there are some exceptions.
• For instance, the time limit is decreased in youth games to compensate for the youngsters’ lack of fitness.
• Both men’s and women’s games last 90 minutes with a 15-minute half-time period in the middle.
• Both games can acquire extra time depending on stoppages and injuries.
• The duration of each match shall be 90 minutes, except in special cases, provided for in these Competition Rules, where an extra 30 minutes shall be played.
• The Referee shall allow for time lost in accordance with the Laws of the Game or through accident or other cause and his decision on this matter is not subject to appeal.
• The half-time interval shall be 15 minutes for all ties in all competitions.
• Both teams shall enter the field of play together, five minutes prior to the kick-off time, along with the Match Officials.