1. an electric pole cost a shadow of legth 20m at a time when a tree 6m height costs a shawdow of length 8m find the height of the pole?
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Observation: At any point of time the shadow of an object is proportional to its height.
This means that the ratio of height to shadow is same for all objects at a given point of time.
Now, let height of the pole be h m.
Therefore, h/20 = 6/8
=> h = 6×20/8
=> h = 15
Therefore, h m = 15 m.
[Answer]
Hope this helps. Follow for more answers from me. Please comment for further clarifications. Thanks!
[PS: Similarity of triangles can also be used in this case. In fact the above observation can be proved by the similarity of triangles.]
This means that the ratio of height to shadow is same for all objects at a given point of time.
Now, let height of the pole be h m.
Therefore, h/20 = 6/8
=> h = 6×20/8
=> h = 15
Therefore, h m = 15 m.
[Answer]
Hope this helps. Follow for more answers from me. Please comment for further clarifications. Thanks!
[PS: Similarity of triangles can also be used in this case. In fact the above observation can be proved by the similarity of triangles.]
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