Area of the equilateral triangle with side length of x is 43​​x2.
Volume of the triangular prism
=B⋅h=43​​x2⋅3​x=43​x3
Since the volume of the prism is given as 481​,
the equation 43​x3=481​ can be used to find the value of x.
43​x3=481​⇒3x3=81⇒x3=27
⇒x=327​=3