1. The diagram shows an open tank for storing water, ABCDEF. The sides ABFE and CDEF are rectangles. The triangular ends ADE and BCF are isosceles, and Angle AED = BFC = 90deg. The ends ADE and BCF are vertical and EF is horizontal

Given AD = x metres,

a. Show that the area of triangle ADE is 0.25x^2 m^2

b.Given that the capacity of the container is 4000m^3 and that the total are of the two triangular and two rectangular sides of the container is S m^2.

Show that S = (x^2)/2 + {16000(2^1/2)}/x

The question looks straight-forward, i did indeed try it but couldn't figure out the solution.

Plz find attached figure as question 8 in jpeg.

Any help or hint will be much appreciated.

THX