The height of an equilateral triangular prism increases by one unit. The new lateral area is more than the original by how much?

the perimeter of the base
the area of the base
the height
the area of one lateral face

Question

The height of an equilateral triangular prism increases by one unit. The new lateral area is more than the original by how much?


		the perimeter of the base
		the area of the base
		the height
		the area of one lateral face

directrix · Answer

the area of the base
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V of original prism = Bh where B is the area of the base and h is the height.
V' = B(h+1)  where V; is the volume of the increased prism.
V' = Bh + B which when compared with Bh, the volume of the original prism, differs by just B, the area of the base.

anonymous · Answer

Thanks :)
I got one more question can you help?