Question

A girl is standing 360 cm from a lamp post at night. If the height of the girl is 160 cm
and her shadow is 90 cm long, then find the height of the lamp post.​ (math question)

Answer 1

Answer:

110 cm

Explanation:

360cm-160cm=200cm

200cm-90cm=110cm

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Answer 2

Answer:

Let AB be the lamp post and CD be the girl and her shadow on ground is DE

Now triangles ABE and CDE are similar,

therefore AB/CD = height of lamp post/height of the girl=BE/DE

AB/160=360/90=4

Therefore AB =4×160=640 cm=height of lamp post