Answers to page 55 of PEP's mathematics homework Design a 400 meter track for the school (1) The length of the straight runways on both sides of the 400 meter runway is 100 meters, and how long is the diameter of the two semicircles? (the width of the standard runway is 1.25 meters, and the number obtained remains integer.) (2) What is the area of the lawn on the inside of the runway (3) Long and Qingqing walk around the inside and outside of the runway. How many meters is the difference between them

Answers to page 55 of PEP's mathematics homework Design a 400 meter track for the school (1) The length of the straight runways on both sides of the 400 meter runway is 100 meters, and how long is the diameter of the two semicircles? (the width of the standard runway is 1.25 meters, and the number obtained remains integer.) (2) What is the area of the lawn on the inside of the runway (3) Long and Qingqing walk around the inside and outside of the runway. How many meters is the difference between them

(1) : 200 / 3.14 ≈ 64M
(2):100*64=6400㎡
(3) : 2.5 * 3.14 = 7.85m
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