The radius of the base of a right circular cone is 4 in., and its slant height is 15 in. If the radius and the slant height are
each multiplied by 6, by what factor is the surface area multiplied? A. 6 B. 9 C. 12 D. 36
1 answer:
Answer:
Step-by-step explanation:
radius r = 4 in
slant height L = 15 in
base area = πr² = 16π in²
lateral area = πrL = 60π in²
surface area = 76π in²
r = 4×6, L = 15×6
base area = (4×6)²π = 16π×36
lateral area = 60π×36
surface area is multiplied by 36
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