TEACHER-GUIDE-VERIFIED · TG-V9-078

3. Planet B has twice Planet A's radius. Compare surface areas and volumes.

Verified solution

Solution: Surface area factor=2^2=4; volume factor=2^3=8.

Source: Teacher Guide V9 · English V9. Match the numbers and wording in your printed question before using this solution.

Watch the worked example Previous question Search all questions Next question

VIDEO HELP · TG-V9-078

Compare Two Planets by Radius (TG-V9-078)

Model both planets as spheres. Doubling the radius multiplies surface area by 4 and volume by 8; cancel the formula constants and check by substituting 2r.

Space Math Explorers · approved worked example · 1:08 · Watch on YouTube

Need another kind of explanation?

Return to the matching online lesson for its formulas, examples, and problem-specific tutor. A reviewed video appears there only when it has been checked and assigned.

Choose the matching mission and lesson

Scope of this help

These pages reproduce verified solution steps for the registered V9 questions. It does not diagnose learning needs or replace instruction from a qualified teacher or tutor.