Mathematics for IGCSE & O level - Equations (Section 8 - No. 31)
To change the subject of a formula like V = πr²h to r, what are the key steps?
Divide both sides by πh.
Take the square root of both sides.
Subtract π and h from both sides.
Multiply both sides by πh.
Giải thích
These operations isolate and solve for r.