2012 · Q35
If the outer and inner diameters of a stone parapet around a well are 112 cm and 70 cm respectively, then what is the area of the parapet?
Elementary MathematicsMensuration
- A264 square cm
- B3003 square cm
- C6006 square cm
- D24024 square cm
Explanation
Area = pi*(56^2 - 35^2) = (22/7)*1911 = 6006 square cm.