Q: Is 29.9 kmph a good sprinting speed for a 13 year old girl?

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Let speed of stream = y kmph & speed of boat = x kmphspeed downstram((x + y)kmph) = 8 * 60 / 40 kmph= 12 kmphspeed upstream((x - y) kmph) = 8/1 kmph= 8 kmphx + y = 12x - y = 8--------------2x = 20,2y = 4x = 10,y = 2=>Speed of stream = 2 kmph, Speed of boat = 10 kmp

it depends on the speed of the vehicle I.E if its speed it 600 kmph then it will take 1 hour , It it is 300 kmph then 2 hour if u tell the exact speed the answer would be more accurate.... GOOD LUCK!

mph / kmph

126.9 kmph

Leopards can run at speeds of over thirty-eight MPH

365 kmph

408 KMPH

Its 120 KMpH.

around 220 mph (354 kmph)the bugatti veyron is 252 mph (407 kmph)

around 100 kmph

In 2012 it was 37.8km/h

200 kmph