If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

High school geometry

Course: High school geometry > Unit 9

Lesson 3: Volume and surface area
Math
High school geometry
Solid geometry
Volume and surface area
© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

Apply volume of solids

Google Classroom
You might need: Calculator

Problem

Wesley makes spherical fish tanks with a diameter of 30 cm. A customer requests a smaller tank with half the volume of the tank that Wesley usually makes.
What is the approximate diameter of the smaller tank?
Round to the nearest tenth.
  • Your answer should be
  • an integer, like 6
  • a simplified proper fraction, like 3/5
  • a simplified improper fraction, like 7/4
  • a mixed number, like 1 3/4
  • an exact decimal, like 0.75
  • a multiple of pi, like 12 pi or 2/3 pi
cm
Stuck?
Stuck?