4 （ ） —=（ ）：16=（ ）：24=—=（ ） 3 20

4 （ ） —=（ ）：16=（ ）：24=—=（ ） 3 20

4 / 3 = ( 64/3 ) :16 = ( 32 ) :24 = ( 80/3 ) /20 = ( 4:3 )

How to solve the "starting line" in the sixth grade of mathematics volume I

1
two
three
four
five
six
seven
eight
Diameter (m)
seventy-two point six
seventy-five point one
seventy-seven point six
eighty point one
eighty-two point six
eighty-five point one
eighty-seven point six
ninety point one
Perimeter (m)
two hundred and twenty-eight point zero eight
two hundred and thirty-five point nine three
two hundred and forty-three point seven nine
two hundred and fifty-one point six four
two hundred and fifty-nine point five zero
two hundred and sixty-seven point three five
two hundred and seventy-five point two zero
two hundred and eighty-three point zero six
Total length (m)
four hundred
four hundred and seven point eight five
four hundred and fifteen point seven one
four hundred and twenty-three point five six
four hundred and thirty-one point four two
four hundred and thirty-nine point two seven
four hundred and forty-seven point one two
four hundred and fifty-four point nine eight

On the starting line of mathematics in the sixth grade volume I of Beijing Normal University Edition
The starting line of those problems thought for a long time can not come up with TVT
So I want to ask about the starting line
For example: how to calculate the length of the runway
How to calculate the distance between two runways
How to calculate the starting line to advance how many meters
What's more, if you run several hundred meters, the starting line of the innermost track has been drawn, and then the starting line in turn should be advanced by how many meters
There should be a fixed formula. If you can help me talk about TVT

（1） According to the circle formula C = 2 π R, then the length of the two curves of the first lane is: 2 × 3.1416 × (36 + 0.30) M = 228.08m a curve