The radius R of a sphere is 4.3cm. Calculate the sphere's surface area A.Use the value 3.14 for π, and round your answer to the nearest tenth.
Question
The radius R of a sphere is 4.3cm.
Calculate the sphere's surface area A. Use the value 3.14 for π, and round your answer to the nearest tenth.
Solution
The formula for the surface area A of a sphere is given by A = 4πR².
Step 1: Substitute the given values into the formula. In this case, R = 4.3 cm and π = 3.14.
So, A = 4 * 3.14 * (4.3)²
Step 2: Calculate the square of the radius (4.3)² = 18.49 cm².
Step 3: Multiply the result by 4 and by 3.14.
So, A = 4 * 3.14 * 18.49 = 231.876 cm².
Step 4: Round the result to the nearest tenth.
So, the surface area of the sphere is approximately 231.9 cm².
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