All ISEE Upper Level Math Resources
Example Questions
Example Question #381 : Geometry
There is a perfectly spherical weather balloon with a surface area of , what is its diameter?
Possible Answers:
Correct answer:
Explanation:
There is a perfectly spherical weather balloon with a surface area of , what is its diameter?
Begin with the formula for surface area of a sphere:
Now, set it equal to the given surface area and solve for r:
First divide both sides by .
Then square root both sides to get our radius:
Now, because the question is asking for our diameter and not our radius, we need to double our radius to get our answer:
Kevin
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Rutgers University-New Brunswick, Current Undergrad Student, Computer Engineering, General.
Aaron
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Portland State University, Bachelors, Economics. Portland State University, Masters, Environmental and Resource Management.
All ISEE Upper Level Math Resources
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