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Pavel [41]
3 years ago
5

A six foot man is standing 10 feet away from a 20 foot lamppost. what is the length of his shadow?

Mathematics
2 answers:
timofeeve [1]3 years ago
7 0

Answer:

4.29 feet ( approx )

Step-by-step explanation:

Let x be the length of the shadow of man,

Given,

The height of the man = 6 feet,

The height of the lamppost = 20 foot,

Distance of the man from the lampost = 10 feet,

By making the diagram,

We found two similar triangles in which first triangle having sides 6 and x,

Second triangle having sides 20 and x + 10,

∵ The corresponding sides of similar triangle are in same proportion,

\implies \frac{x}{x+10}=\frac{6}{20}

20x = 6x + 60

20x - 6x = 60

14x = 60

\implies x = \frac{60}{14}=4.28571428571\approx 4.29

Hence, the length of the shadow is approximately 4.29 feet.

elena55 [62]3 years ago
4 0
There are two congruent triangles that are being formed from the lamppost, the light, the ground and the man. Always try to draw a picture for these types of problems. It helps a lot when solving. Your answer should be about 4.3ft

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