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# Surface area of geometrical figures

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Intern
Joined: 14 Aug 2017
Posts: 15
GMAT 1: 660 Q49 V34
Surface area of geometrical figures  [#permalink]

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02 Sep 2018, 00:18
1
When any question talks about surface area, should we calculate surface area or total surface area .

This is a big doubt for cylinders and hemispheres where base surface area is calculated separately and curved is calculated separately.

Can any expert help with this.Bunuel stonecold @EmpowerRichC

Example of a reference question from Economist :

The surface area of Cylinder A is how many times the surface area of Cylinder B?

(1) The diameter of A is twice the diameter of B.

(2) The height of A is equal to the height of B.

---------------
[b]Aman
Another
explorer![/b]
Math Expert
Joined: 02 Sep 2009
Posts: 58464
Re: Surface area of geometrical figures  [#permalink]

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02 Sep 2018, 02:07
beebuzz0504 wrote:
When any question talks about surface area, should we calculate surface area or total surface area .

This is a big doubt for cylinders and hemispheres where base surface area is calculated separately and curved is calculated separately.

Can any expert help with this.Bunuel stonecold @EmpowerRichC

Example of a reference question from Economist :

The surface area of Cylinder A is how many times the surface area of Cylinder B?

(1) The diameter of A is twice the diameter of B.

(2) The height of A is equal to the height of B.

---------------
[b]Aman
Another
explorer![/b]

Surface are = total surface area.

That question is discussed here: https://gmatclub.com/forum/the-surface- ... 41793.html
_________________
Re: Surface area of geometrical figures   [#permalink] 02 Sep 2018, 02:07
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# Surface area of geometrical figures

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