turkey-yks 2020 Q21

turkey-yks · Other · yks-tyt Solving quadratics and applications Geometric or real-world application leading to a quadratic equation

In a neighborhood with 95 buildings, each building is either 2 or 3 stories. Within the scope of urban renewal, 15 of these buildings are demolished and replaced with 5-story buildings each, and the total number of stories of the buildings in the neighborhood increases from 240 to 274.
Accordingly, by what percentage did the number of 3-story buildings in the neighborhood decrease as a result of urban renewal?
A) 16
B) 18
C) 20
D) 22
E) 24

In a neighborhood with 95 buildings, each building is either 2 or 3 stories. Within the scope of urban renewal, 15 of these buildings are demolished and replaced with 5-story buildings each, and the total number of stories of the buildings in the neighborhood increases from 240 to 274.

Accordingly, by what percentage did the number of 3-story buildings in the neighborhood decrease as a result of urban renewal?\\
A) 16\\
B) 18\\
C) 20\\
D) 22\\
E) 24

Paper Questions

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