Formula deep page
Sphere
SA=4πr² | V=4/3 πr³
This formula belongs to the chapter "Surface Areas and Volumes" in Class 9 Mathematics. Use it after identifying the right variables, matching the chapter context, and writing the substitution clearly.
How to use it
- Identify the quantity you need to find.
- Check the related variables and units from the question.
- Substitute values carefully into the formula.
- Simplify step by step and write the final statement.
Worked cue
r=6cm: SA=4π×36≈452.4 cm² | V=4/3×π×216≈904.8 cm³