Honestly, It depends on the girl.
Some don't even pitch 40, while others pitch nearly 60.
1887
No. Fast-pitch is were they have the big softballs. In slow pitch, they have little ones. But they are both bigger than Baseballs! The BIG balls that you see in collage softball are started being used in 12 and under. (Which is 11 and 12 year olds) 8, 9, 10 year olds use the middle sized ball. 5, 6, 7 year old us the little balls. The liitle balls are a little bigger than baseballs.
1911 approximately
Should pitch at least 75 at high 80
A 10 year old girl should pitch about 40-55mph.
The year was 1991
38-45 mph
11.6 Seconds
9 and 10 year olds.
start off slow then gradually go faster for more fun ;)
In my opinion, 12 year old shouldn't pitch the ball fast. Hard but not fast! In other words, don't hold back but don't strain either. You have plenty of time to develop speed once your body is developed. Concentrate on good fielding and ball contact when batting and your set for huge future in fpsoftball. A glove is 10 times better than a bat or a pitch.
Depends on where you live. In the south we start playing in February and end around November.