[填空题]
A reservoir of water ha4u0mabokk jryugs-7t8 b ynh/n :9i 8;s a cross-sectional area shown w*,r9f: nn jowin the shaded region of the diagram below, where x and y values are in metres. The bottom of the reservoi9,: rwfnnjwo *r (the curve shown) has an equation in the form
$y=k(x-8)^{2}$
1. Find the area of the rectangle OMNP, The area of the rectangle OMNP is determined by A$_1$= m$^2$.
2. Determine the value of k is $\frac{a}{b}$;a= ,b= .
3. Find the cross-sectional area of the reservoir.
The number is m$^2$.
