A3 How tall is the pole if one third of the pole is in the ground, half is in the water, and above the water is 1.5 meters?
(A) $7.5 \mathrm{~m}$
(B) $8 \mathrm{~m}$
(C) $9 \mathrm{~m}$
(D) $9.5 \mathrm{~m}$
(E) $10 \mathrm{~m}$
A3. If $x$ is the height of the entire pole, its half measures $\frac{x}{2}$, and its third $\frac{x}{3}$. From the equation $\frac{x}{3}+\frac{x}{2}+1.5 \text{ m}=x$, we find that the height of the pole is $x=9 \text{ m}$.