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JulsSmile [24]
3 years ago
6

A set of telephone poles is stacked in a pile, 8 layers high. The top layer consists of 20 telephone

Mathematics
1 answer:
Anarel [89]3 years ago
5 0

<u><em>Answer:</em></u>

D. 272 poles

<u><em>Explanation:</em></u>

<u>We are given that:</u>

The top layer has 20 poles, the next down one has 24 poles and the third one has 28 poles

<u>We can note that</u> each layer has 4 poles more that the one above it

<u>Based on this, we can get the number of poles in each layer as follows:</u>

Top layer has 20 poles

Second one has 20 + 4 = 24 poles

Third one has 24 + 4 = 28 poles

Fourth one has 28 + 4 = 32 poles

Fifth one has 32 + 4 = 36 poles

Sixth one has 36 + 4 = 40 poles

Seventh one has 40 + 4 = 44 poles

Eighth one has 44 + 4 = 48 poles

Now, we can get the total number of poles by adding the poles in all layers

<u>This is done as follows:</u>

Total number of poles = 20 + 24 + 28 + 32 + 36 + 40 + 44 + 48

Total number of poles = 272 poles

Hope this helps :)

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