exam
Maths Puzzle
Numerical Ability
A=2rh+2r^2; solve for h
This is how I worked it out.
A=2rh+2r^2
A-2r^2=2rh+2r^2-2r^2
A-2r^2=2rh
A-2r^2/2r=2rh/2r
A-r=h
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