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Effectus [21]
2 years ago
15

A tree is 12 metres tall and casts a shadow 9 metres long. A building nearby casts a shadow that measures 21 metres. How tall is

the building? (Draw a picture, set up a proportion)
1) 16 m
2) 24 m
3) 21 m
4) 28 m
Mathematics
1 answer:
Ulleksa [173]2 years ago
8 0
The answer to this question is 16m
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Answer:

12x+22(y+10)=1240, y=x

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Step-by-step explanation:

let x be the number of small cups and y the number of large cups.

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12x+22(y+10)=1240

#Before the 10 more were sold, the number of x and y sold were equal>

x=y\\\\\therefore 12x+22(x+10)=1240\\\\12x+22x+220=1240\\\\34x=1240-220\\\\34x=1020\\\\x=30

The number of small cups sold was 30

#Since, the number of large cups was 10 more, y=x+10=30+10=40

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That should be the answer

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