Question

find the side of a cube whose total surface area is 3750m`2

Answer 1

T. S. A=6a²
6a²=3750
a²=3750/6=625
a²=25²
a=25

Answer 2

$total \: surface \: area \: of \: cube \: = 6a {}^{2} \\ 3750 \: m {}^{2} = 6 \times a {}^{2} \\ \frac{3750 \: m {}^{2} }{6} = a {}^{2} \\ 625 \: m {}^{2} = a {}^{2} \\ \sqrt{625} = a \\ a = 25$