发布时间:2025-02-03 01:19:07
这不很简单,半圆式田径场的两个弯道长度之和,正好等于一个圆的圆周。跑道总长为200米,而直道是50米,那么两边直道总长为50*2=100米,所以两个半圆总长是100米。那么内突沿半径为
C=2∏(圆周率)r, 100=2*3.1415926*r,解得r=15.92米。
还要麻烦你啦如果疏散楼梯间内墙开门窗洞口楼道烟气一样会进入房间啊虽然可能少点有规范吗
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