Question 734653
bend in the middle . you will get an isosceles triangle .

The height of triangle will be {{{(sqrt(3)/2) *2}}}  
={{{sqrt(3)}}}

Area of triangle = (1/2) * base * height

A= sqrt(3)/2 * base

Length = 6 feet


Volume of tank = 6*sqrt(3)/2 * base

9=sqrt(3)/2 * base

Base = width of tank = 6sqrt(3)