he diameter D of a sphere is 9.4mm. Calculate the sphere's surface area A.
Question
he diameter D of a sphere is 9.4mm. Calculate the sphere's surface area A.
Solution
Sure, to calculate the surface area of a sphere, we use the formula:
A = 4πr²
Where:
- A is the surface area
- r is the radius of the sphere
Given that the diameter D of the sphere is 9.4mm, we can find the radius by dividing the diameter by 2:
r = D/2 = 9.4mm / 2 = 4.7mm
Now we can substitute r into the formula:
A = 4π(4.7mm)²
A = 4π * 22.09mm²
A = 277.6mm²
So, the surface area of the sphere is approximately 277.6 square millimeters.
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