SOLUTION: Tom and Jerry each order a pizza. The circumference of Tom’s pizza is 30% greater than the cir-cumference of Jerry’s pizza. The area of Tom’s pizza is what percentage greater than

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Question 247148: Tom and Jerry each order a pizza. The circumference of Tom’s pizza is 30% greater than the cir-cumference of Jerry’s pizza. The area of Tom’s pizza is what percentage greater than the area of Jerry’s ?
(A)30% (B) 49% (C) 50% (D) 69% (E) 75%
Answer by Alan3354(69443) About Me  (Show Source):
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Tom and Jerry each order a pizza. The circumference of Tom’s pizza is 30% greater than the cir-cumference of Jerry’s pizza. The area of Tom’s pizza is what percentage greater than the area of Jerry’s ?
(A)30% (B) 49% (C) 50% (D) 69% (E) 75%
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Circumference and radius are directly related, so the radius is 1.3 times.
Area is a function of the square of the radius, so it's 1.69 times (1.3*1.3).
That's 69% greater.