Question

Find the surface area of the cubical portion of Gumbaz excluding the top and bottom
if one side is about 40m
a) 2500m-b) 25000 mc) 6400m3 d) 125000m​

Answer 1

Given:

One side of the cubical portion of Gumbaz is about 40m

To Find:

The surface area of the cubical portion of Gumbaz excluding the top and bottom

Solution:

Since a cube consists of 6 square faces, the total surface area can be determined by the formula:

Total surface area = 6 x side x side

But it is asked in the question to exclude the top and the bottom sides,

So the formula to calculate the area of the remaining portion will be:

Area of the remaining portion = 4 x side x side

                                                 = 4 x 40 x 40

                                                 = 6400m²

Hence, the area of the given portion is 6400m² (Option c)