Question

The total surface area of a cube is 726 cm. Find the length of its edge

Answer 1

Hey friend,

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Total surface area of cube = 6a²
   
 Here, 726 cm² is the total surface area of cube.

Therefore,
                     6a² = 726 
                       a² = 726/6
                       a² = 121
                       a = √121
                       a = 11.

Hence, Length of edge is 11 cm.

Answer 2

solution:-

we know total surface area ( TSA ) of a cube = 6a²

here, in question given ( TSA ) of cube = 726 cm.

i.e. 6a² = 726 cm²

a = 726 / 6 = 121 cm

therefore, a²= 121cm

so, a= 11cm.

hence, the length of each edge of cube is 11cm.