2012 · Q24
What is the length of the uniform wire of diameter 0.4 cm that can be drawn from a solid sphere of radius 9 cm?
Elementary MathematicsMensuration
- A243 m
- B240 m
- C75 m
- D60 m
Explanation
Sphere volume (4/3)*pi*729 = pi*(0.2)^2*L gives L = 24300 cm = 243 m.