https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-volume/e/volume-of-cylinders--spheres--and-cones-word-problems 2025-11-22T10:30:57.616480509Z Volume of cylinders, spheres, and cones word problems Solve word problems involving volume of cylinders, spheres, and cones. Lindsay exercise https://www.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-3/x03e14a980a7a91ad:mensuration/v/surface-area-of-sphere-computation-and-sense-of-formula 2024-01-17T11:25:19.383730229Z Surface area of sphere: computation and sense of formula Why Is the formula for surface area of sphere equal to 4pir^2? And applying its formula to find the surface area. Devashish Phadnis video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Surface area of sphere: computation and sense of formula Why Is the formula for surface area of sphere equal to 4pir^2? And applying its formula to find the surface area. https://cdn.kastatic.org/ka-youtube-converted/IZ4DpWYO3kY.mp4/IZ4DpWYO3kY.mp4 270 Sphere and Hemisphere https://www.khanacademy.org/math/revision-term-1-od-math-class-10/x03e14a980a7a91ad:week-3/x03e14a980a7a91ad:mensuration/e/surface-area-of-spheres 2026-03-07T07:50:55.659331768Z Surface area of spheres Let's solve some problems and apply the formula for the surface area of spheres. Aakash Bagga exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:sphere/v/volume-of-a-sphere-indian-accent 2025-06-04T10:04:13.13703146Z Volume of a sphere The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius. The radius of a sphere is half its diameter. So, to calculate the volume of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Volume of a sphere The formula for the volume of a sphere is V = 4/3 π r³, where V = volume and r = radius. The radius of a sphere is half its diameter. So, to calculate the volume of a sphere given the diameter of the sphere, you can first calculate the radius, then the volume. https://cdn.kastatic.org/ka-youtube-converted/tFcmjvpIyhM.mp4/tFcmjvpIyhM.mp4 155 Sphere and Hemisphere https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-volume/e/volume-of-spheres 2025-03-03T19:47:54.930712342Z Volume of spheres Practice applying the volume formulas for spheres. Lindsay exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:hemisphere/v/surface-area-of-a-hemisphere 2025-10-27T12:01:04.888258735Z Surface area of a hemisphere In this video, we explore the surface area of a hemisphere—a three-dimensional shape that's half of a sphere. You'll learn the difference between curved surface area and total surface area, understand the formulas behind each, and see how they’re derived step by step. With clear visuals and real-world examples, we make the concept easy to grasp and apply. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Surface area of sphere 00:47 CSA of hemisphere 01:27 TSA of hemisphere 02:42 Practice Question Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Khan Academy Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Surface area of a hemisphere In this video, we explore the surface area of a hemisphere—a three-dimensional shape that's half of a sphere. You'll learn the difference between curved surface area and total surface area, understand the formulas behind each, and see how they’re derived step by step. With clear visuals and real-world examples, we make the concept easy to grasp and apply. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Surface area of sphere 00:47 CSA of hemisphere 01:27 TSA of hemisphere 02:42 Practice Question Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/Uwnuy5HwYZs.mp4/Uwnuy5HwYZs.mp4 210 Sphere and Hemisphere https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:hemisphere/e/word-problems-on-surface-area-of-hemisphere 2026-02-11T08:39:31.456454846Z Word problems on Surface area of hemisphere In this exercise the students solve the worded problems where they apply formulas to find surface area hemisphere Khan Academy exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:hemisphere/v/volume-of-a-hemisphere 2025-10-27T12:01:04.888258735Z Volume of a hemisphere In this video, we explore the volume of a hemisphere—a three-dimensional shape that's half of a sphere. You'll learn the formula for calculating its volume, understand how it's derived, and see how it compares to the volume of a full sphere. We also walk through a practice question step by step to help reinforce the concept and build confidence. With clear visuals and intuitive explanations, this lesson makes 3D geometry feel simple and approachable—perfect for students preparing for exams or anyone curious about how shapes hold space. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Volume of sphere- Introduction 00:45 Volume of hemisphere 01:15 Practice Question Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Khan Academy Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Volume of a hemisphere In this video, we explore the volume of a hemisphere—a three-dimensional shape that's half of a sphere. You'll learn the formula for calculating its volume, understand how it's derived, and see how it compares to the volume of a full sphere. We also walk through a practice question step by step to help reinforce the concept and build confidence. With clear visuals and intuitive explanations, this lesson makes 3D geometry feel simple and approachable—perfect for students preparing for exams or anyone curious about how shapes hold space. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Volume of sphere- Introduction 00:45 Volume of hemisphere 01:15 Practice Question Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/4ocKazhuc1Y.mp4/4ocKazhuc1Y.mp4 146 Sphere and Hemisphere https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:surface-areas-and-volumes/x06d55bfa213a79fd:hemisphere/e/volume-of-hemisphere-word-problems 2025-10-06T11:00:50.235589704Z Volume of hemisphere : Word problems In this exercise students apply their understanding of formula and concepts of finding volume of hemisphere Khan Academy exercise