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歡迎您訪問數學考題練習:在同一時刻,一竹竿高2m,影長3m,而一大樓的!

數學考題練習:在同一時刻,一竹竿高2m,影長3m,而一大樓的

更新時間:2024-01-12 16:25:37作者:貝語網校

在同一時刻,一竹竿高2m,影長3m,而一大樓的影長是45m,這個大樓的高是

A.15m

B.67.5m

C.20m

D.30m

試題答案

D

試題解析

利用相似三角形的相似比,竹竿:竹竿的影長=樓高:樓的影長,進行計算.

解答:大樓的高是=30(m).故選D.

點評:考查了相似三角形在實際生活中的應用.利用對應邊成比例列方程求解.

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