A & B are playing a tennis series. B has won 3 matches on this series. 12 minutes 30 seconds are required to play every match. And they takes rest for 3 minutes 20 seconds after playing a match and before starting a new match. The total time of the series is 2 hours 35 minutes. So how much match has been played on that series? How much match A wins?
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Answer:
The duration of a tennis match is often more than an hour and in some cases more than five hours,11 and effective playing time—that is, percentage of the total playing time in a match—amounts to 20–30% on clay courts and 10–15% on fast court surfaces.17 During this time, a tennis player runs an average of 3 m per shot and a total of 8–12 m in the course of a point,18 completing 300–500 high intensity efforts during a best of three sets match. The number of directional changes in an average point is four,19 and rallies during a match typically last less than eight seconds (five to seven). Players average 2.5–3 strokes per rally, depending on their game style, ball type (1, 2, or 3), surface, sex, and tactical strategy.2,6,7 About 80% of all strokes are played within 2.5 m of the player's ready position. About 10% of strokes are made with 2.5–4.5 m of movement with primarily a sliding type movement pattern, and fewer than 5% of strokes are made with more than 4.5 m of movement and a running type movement pattern.17