Any area is proportional to the square of its linear dimensions. So, in order to triple
the surface area of a cone, you would have to multiply its radius and height each
by sqrt(3) = 1.732 (rounded).
It could be done by increasing only the radius, or only the height, but then the
proper factor would depend on the other dimension that isn't being changed.
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If a is the side,lateral surface area of cube=4a2
surface area is lateral area
Lateral area excludes the areas of the top and bottom faces, which are included in the surface area.
The lateral surface area is 549.78mm2