The problem states that the surface area of a sphere is four times the area of its largest cross section. We need to find the approximate surface area of a cantaloupe that is 6 inches in diameter and round the answer to the nearest square inch. We are given that we should use $3.14$ for $\pi$.

GeometrySurface AreaSphereDiameterRadiusApproximation
2025/4/16

1. Problem Description

The problem states that the surface area of a sphere is four times the area of its largest cross section. We need to find the approximate surface area of a cantaloupe that is 6 inches in diameter and round the answer to the nearest square inch. We are given that we should use 3.143.14 for π\pi.

2. Solution Steps

The formula for the surface area of a sphere is:
A=4πr2A = 4 \pi r^2
where AA is the surface area and rr is the radius.
We are given the diameter of the cantaloupe, which is 6 inches. The radius is half of the diameter.
r=62=3r = \frac{6}{2} = 3 inches
Now we can calculate the surface area using the formula and the given value for π\pi.
A=4πr2=4×3.14×(3)2A = 4 \pi r^2 = 4 \times 3.14 \times (3)^2
A=4×3.14×9A = 4 \times 3.14 \times 9
A=12.56×9A = 12.56 \times 9
A=113.04A = 113.04 square inches.
We need to round the answer to the nearest square inch.
A113A \approx 113 square inches

3. Final Answer

113 square inches

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