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%E5%A6%82%E5%9B%BE%EF%BC%8C%E9%93%81%E8%B7%AFMN%E5%92%8C%E5%85%AC%E8%B7%AFPQ%E5%86%8D%E7%82%B9O%E5%A4%84%E4%BA%A4%E6%B1% - PowerPoint PPT Presentation


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B. C. D. 如图,铁路 MN 和公路 PQ 再点 O 处交汇∠ QON=30° ,公路 PQ 上 A 处距离 O 点 240m ,火车行驶时周围 200 以内会受到噪音的影响,那么火车在铁路 MN 上沿 ON 方向,以 72 千米每小时的速度行驶, A 处受噪音影响的时间约为多少秒?(精确到 0.1s) (A) 12 秒 (B) 16 秒 (C) 20 秒 (D) 24 秒. N. P. O. M. A. Q.

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PowerPoint Slideshow about '%E5%A6%82%E5%9B%BE%EF%BC%8C%E9%93%81%E8%B7%AFMN%E5%92%8C%E5%85%AC%E8%B7%AFPQ%E5%86%8D%E7%82%B9O%E5%A4%84%E4%BA%A4%E6%B1%' - milek


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B

C

D

如图,铁路MN和公路PQ再点O处交汇∠QON=30°,公路PQ上A处距离O点240m,火车行驶时周围200以内会受到噪音的影响,那么火车在铁路MN上沿ON方向,以72千米每小时的速度行驶,A处受噪音影响的时间约为多少秒?(精确到0.1s)

(A) 12秒 (B) 16秒 (C) 20秒 (D) 24秒

N

P

O

M

A

Q


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