Problem

Match each sphere to its surface area by selecting the number on the right by the statement on the left. A sphere with a diameter -4 meters 1. $226.87 \mathrm{~m}^{2}$ A sphere with a radius - 4 meters 2. $907.46 \mathrm{~m}^{2}$ 12 A sphere with a radius $=8.5$ 3. $200.96 \mathrm{~m}^{2}$ meters A sphere with a diameter $=8.5$ 4. $50.24 \mathrm{~m}^{2}$ meters

Solution

Step 1 :Given the diameter and radius of different spheres, we are to find their respective surface areas. The surface area of a sphere is given by the formula \(4\pi r^2\), where \(r\) is the radius of the sphere. If the diameter is given, the radius is half of the diameter.

Step 2 :For a sphere with a diameter of 4 meters, the radius is \(\frac{4}{2} = 2\) meters. Substituting this into the formula gives a surface area of \(4\pi (2)^2 = 50.27 \mathrm{~m}^{2}\).

Step 3 :For a sphere with a radius of 4 meters, substituting this into the formula gives a surface area of \(4\pi (4)^2 = 201.06 \mathrm{~m}^{2}\).

Step 4 :For a sphere with a radius of 8.5 meters, substituting this into the formula gives a surface area of \(4\pi (8.5)^2 = 907.92 \mathrm{~m}^{2}\).

Step 5 :For a sphere with a diameter of 8.5 meters, the radius is \(\frac{8.5}{2} = 4.25\) meters. Substituting this into the formula gives a surface area of \(4\pi (4.25)^2 = 226.98 \mathrm{~m}^{2}\).

Step 6 :Final Answer: A sphere with a diameter of 4 meters matches with \(\boxed{50.27 \mathrm{~m}^{2}}\), a sphere with a radius of 4 meters matches with \(\boxed{201.06 \mathrm{~m}^{2}}\), a sphere with a radius of 8.5 meters matches with \(\boxed{907.92 \mathrm{~m}^{2}}\), and a sphere with a diameter of 8.5 meters matches with \(\boxed{226.98 \mathrm{~m}^{2}}\).

From Solvely APP
Source: https://solvelyapp.com/problems/20420/

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