Speed doing what? Running? Mathematical sums?
Average about 10-15 mph
For a 15 year old boy of average height (5'9") 150 pounds For a 15 year old girl of average height (5'4.5") 121 pounds
The average weight for a male 15-year old is roughly 125-140 pounds. The average height for a male 15-year old is 5'7.
My daughter ran a 5.7 40. She'll be 15 in October.
3
15 mph sprinting full speed is average for a 10 year old. Also, a 10 year old to run a mile in 9 min and 45 sec running as fast as they can.
In the Bahamas 15 year old girls run about 12.40 boys run about 12.20
There is no average shoe size for a 15 year old girl. Shoe size can vary and it depends on height.
5'5-6'0
I am 15 and i can sprint up to 34.8 mph other juniors on the team sprint up to 28-29 mph that i know of.
Think of it like this the average height of a 17 year old girl is 5 foot 4 inches so you are growing at a good speed
9stone