SAT Math : How to find the diameter of a sphere

Study concepts, example questions & explanations for SAT Math

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Example Questions

Example Question #2 : Spheres

Find the diameter of a sphere with a surface area of .

Possible Answers:

Correct answer:

Explanation:

Write the formula to find the surface area of a sphere.

Substitute the area and solve for the radius.

The diameter is double the radius.

Example Question #3 : Spheres

What is the diameter of a sphere if the surface area is ?

Possible Answers:

Correct answer:

Explanation:

Write the formula for the surface area of a sphere.

Substitute the area and find the radius.

The diameter is double the radius.

Example Question #4 : Spheres

What is the diameter of a sphere with a volume of ?

Possible Answers:

Correct answer:

Explanation:

Write the formula for the volume of a sphere.

Substitute the volume.

Multiply by  on both sides in order to isolate the  term.

Cube root both sides.

The diameter is double the radius.

The answer is:  

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