PrasannaMurali wrote:
If a right circular cone with an integer height and an integer radius has the same numerical value for its volume and its surface area (including base), find its lateral height.
A. 5
B. 8
C. 10
D. 17
E. 25
Need explanation for the above problem. Have arrived at the following step : {r(h-3)}/3 = l (slant height) and couldn’t move past this.
This question is discussed here:
https://gmatclub.com/forum/if-a-right-circular-cone-with-an-integer-height-and-an-integer-radius-359524.html
Note that Geometry is no longer part of the GMAT syllabus, so you can ignore this question altogether.