The perimeter of the playground is 400m, the length of the two straight roads is 100m respectively, the length of the inner circle curve is 200m, each curve is 1m wide, and there are six runways The perimeter of jinyizhong playground is 400m, the length of two straight roads is 100m respectively, the total length of inner circle curve is 200m, the width of each curve is 1m, and there are six runways (1) how many meters is the difference between the inner ring length and the outer ring length? (2) how many meters is the difference between each runway? What rules do you find?

The perimeter of the playground is 400m, the length of the two straight roads is 100m respectively, the length of the inner circle curve is 200m, each curve is 1m wide, and there are six runways The perimeter of jinyizhong playground is 400m, the length of two straight roads is 100m respectively, the total length of inner circle curve is 200m, the width of each curve is 1m, and there are six runways (1) how many meters is the difference between the inner ring length and the outer ring length? (2) how many meters is the difference between each runway? What rules do you find?

(1) Difference between inner ring and outer ring 2x3.14x6 = 37.68 (m)
(2) The difference of each runway is 2x3.14x1 = 6.28 (m)
One lap difference between adjacent runways 2x3.14x ring width

The track and field competition was held in a primary school. Eight athletes ran a 400m Race. The width of each track was about 1.1m. The curve was semicircle
The track and field competition was held in a primary school. Eight athletes ran a 400m Race. The width of each track is about 1.1m, and the curve part is semicircle. If the starting line of the innermost track has been drawn, then the starting line of each track should be () m ahead of time in turn in the future!

Suppose it's 400 meters
The radius difference is 1.1m, the perimeter difference is 2 * △ R * π = 2 × 1.1 × 3.14 = 6.91m

As shown in the figure, the circumference (inner ring) of a track and field field is 400m, in which the inner rings of two curves (semicircles) are 200m long in total, and the length of the straight section is 200m
As shown in the figure, the perimeter (inner ring) of a track and field field is 400m, in which the inner rings (semicircles) of two curves are 200m long in total, and the length of straight line section is 200m in total. Each runway is about 1m wide (six runways in total). The result is accurate to 0.1M
(1) What is the radius of the inner circle curve
(2) How many meters is the length difference between an inner circle curve and an outer circle curve?

(1) The first step is to calculate the length of the inner ring of a curve 200 △ 2 = 100 (m)
Second, calculate the inner circle curve radius 100 = Πr r = 100 Π = 31.8 (m)
(2) Radius of outer ring: r = 31.8 + 6 = 37.8 (m)
Length of outer ring = Πr = 37.8x Π
Outer ring length inner ring length = 37.8x Π - 100 = 18.8 (m)