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The base of a right circular cone has a radius of 8 cm and a slant height of 12 cm. If the radius and the slant height of the right circular cone are each multiplied by 9, what is the surface area of the new cone divided by the surface area of the original cone?
A. 96
B. 81
C. 72
D. 18

Respuesta :

amna04352

Answer:

D) 81

Step-by-step explanation:

Ratio of sides

1 : 9

Ratio of areas

1² : 9²

1 : 81

Answer:

The answer is B: 81

Step-by-step explanation:

You multiply the scale factor, 9, by itself, or 9^2 which equals 81.

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