The area of a rectangular field is 10092 sq meter. its length is three times as its width .find it's perimeter

Let the width be x
if width =x
length =3x
area=10092
area=length x width
10092=3x x x
10092=3x²
10092/3=x²
3364=x²
√3364=√x²
x=58
width=58m
length=58x3
           =174m
perimeter =2(L+W)
                =2(174+58)
                =2 x 232
                =464m

Idon’t know the answer to this