Question

the side of a cube is _______ cm,whose surface area is 2166 cm².
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Answer 1

Surface area of cube=6a²

=>6a²=2166cm²

=>a²=2166cm²/6

=>a²=361cm²

=>a=19cm

Answer 2

Here the surface area of a cube is given to be 2166 cm²

We have to find the measure of the side of the cube

So, total surface area of cube = 6a², where a is the side of the cube

                                           2166 = 6a²

                                          a² = 2166/6

                                           a² = 361

                                             a = √361

                                             a = 19 cm

Hence, the side of the cube will be 19 cm