Pinocchio's nose grew to four times its normal length. If the rest of Pinocchio's body grew in the same way, what would be his new surface area?
A) 4 times his original surface area
B) 8 times his original surface area
C) 16 times his original surface area
D) 64 times his original surface area
E) None of the answers is correct.

Question

Quizplus · Accepted Answer

When an object's dimensions are scaled by a factor of $k$, its surface area scales by $k^2$. Since Pinocchio's dimensions are scaled by 4, his new surface area would be $4^2 = 16$ times his original surface area.

Pinocchio's Nose Grew to Four Times Its Normal Length